I also think what Khys said - its the first thing I thought. I was waiting though to see if any ISTPS have anything like this, in case its a milder thing, like a different way that an ISTP might think. Maybe some ISTPs will have more to say on it.
But if you communicate with Khys and decide you might have PTSD, you may be interested, and Khys, too, in the following.
I recieved a powerful healing from a ministry called Freedom Encounters in October. It really was powerfully life-changing for me. I dumped a lot of mind-filling stuff like PTSD all at once. I truly did receive a major encounter with freedom. I was not expecting to, or really seeking help, Because I have made a whole lot of progress in getting over past issues; I have had other healings on a less grand scale, and felt I was pretty much fine and on track with, over time, getting through any residual issues I may have missed "fixing" over the years.
I arranged this healing for a friend who has the worst kind of PTSD I ever saw or heard of. This ministry takes the very hardest PTSD cases that other ministries find too hard to fix. When my friend panicked, bailed and landed in the hospital after hurting herself, I took her place, because, I found, they also deal with lesser kinds of PTSD, and I felt the Lord quite clearly and unexpectedly call me to go alone, be healed, and "become whole".
The ministry is more along the lines of Evangelical Christianity. I am not that; I am Roman Catholic, and I am aware of the differences in our faith practices (being a convert from the former), but this was not a problem for me. Its a solid ministry originated from truth-seeking people (Ken and Sylvia Thornberg) who worked with broken people a long time and sought the Lord's leading in how to help the hardest cases. God says in His Word that if anyone seeks wisdom He will give it in great measure. Clearly they sought it, and they sought it fervently and single-mindedly for this problem of PTSD, and clearly they got it, in great measure.
You don't neccesarily have to travel far to it becasue they have trained people everywhere and are/have been training people in Europe. I went for my healing to a minister trained by them just one state away.
There are several DVDs of learning as a pre-requisite for the healing, and it depends on you how fast you can get through them. They reccommend not rushing through the DVDs but taking what time you need to digest the info. When you are done with the DVDs you can go to the healing session. Having gone through the DVDs, there are no "surprises" in the healing session. The healing session itself takes only 4 hours!!! Its truly a miracle to have this much healing in such a short time. And its permanent!!! The session is one-on-one with the minister in a relaxed setting. Its thorough and complete. You go back for a follow-up about a week later to see if anything has been missed.
You can Google it and read about it on their website. One of the most interesting things is that those with PTSD have multiple personalities, and, their belief that most of us have some kind of trauma and we all have some kind of multiples for dealing with it. I don't quite understand it, but it makes sense to me that those with severe PTSD and many multiple personalities are only an amped-up version of what we all do in response to trauma.
Any multiple personalities are integrated in the session, whether you have one or two (as they say almost all of us do) or thousands, as is the case of severe PTSD. All of them are healed and integrated into one whole person. So all of "you" you have always known is there, just healed, one, and whole. This is the major thing I felt after, besides amazingly free and light and like I could do anything, I felt truly WHOLE. I still feel it. It feels like my life was one thing before October, and another thing now. I was never explicitly conscious that I had multiples, but I accept their theory that we almost all do, and I certainly feel lighter, more whole, less divided, less troubled, simpler, easier, freer. Its sort of like night and day.
So if you have PTSD, and if you have even the tiniest amount of faith (I like to say, compared to your entire body, you only need the amount the size of a mustard seed - so not much! And even agnostics have this much, in my opinion) then you can be healed with this ministries able help.
The ministry in one short 4 hour session heals the entire person, including all the personalities, and gathers together back into one whole person - no more multiples. This is so even for the most severe cases, like a Sybil-type case. And the milder ones. I could only vaguely see where I might have multiples but did not focus on that, jsut followed the healing protocol, watching the DVDs and attending the session. The session is very calm, no shouting, no drama, but what happens to you, the healing, is quite dramatic.
No one is getting rich on this ministry. You buy the DVDs at a reasonable price and pay a nominal fee to the minister (because who can work for free day in and day out?) but it is a fraction of what you would pay four hours with a therapist -- and the therapist would only be getting started after 4 sessions! - they need you for 24! Or 50! By that time you can't remeber whether you made any progress or not...).
So believe me, there is no faster cheaper way to heal PTSD, which most people deal with with a lifetime of constant expensive therapy appointments for a snails progress on a giant problem they barely make a dent in, and drugs to help them forget how bad they feel. But Jesus came to make people whole, and this ministry (there are others) is one way He does it.
I wish my freind had gone but she stated to me after she hurt herself, "I want to go on living as before". She has become quite an expert at living with her PTSD/paranoia and has a huge support network of family, her Mormons and friends (I was a huge support to her as her friend) and has had many and continual intense therapies totally thousands of dollars and much, much time... but she shut down for this. Perhaps she was afraid to give up the PTSD which is so much a part of her identity. I don't know. But she knows where to get healing when she is ready.
If what you read on the website raises more questions, you could call them and/or email them. They will get back to you and answer any questions. If you describe to them what you described here they will have some knowledgeable insight on it to offer you, and will let you know more about how they can help. Anyone is welcome to PM me on this, too, and I will answer best I can, though I am no expert.