Hi Pear. Enneagram 6 is one of the most common enneagram types and can be paired with a number of MBTI types, so I can understand your frustration. The 6w5 is going to make for a more knowledgeable person. A 6w5 Perceiving type could be typically disorganized but a stringent rule follower. Your use of the word nervous points to the Enneagram 6. You feel anxiety if the rules aren't followed. It doesn't seem as much about wanting to do it right as fear of doing it wrong, which is a difference between 6s and 1s perhaps. It can appear the same outwardly, but the motivations are different.
There is typically a flip between the J and P in Socionics for introverts. The one possible exception being ISTJ and ISTP. Some Socionicists seem to get those types confused in descriptions, but there should be a flip.
The Socionics and CFs test indicates your Fi is very high and so is your Te. I wouldn't typically expect Te to be so well developed in an INFP. I am half leaning toward ISTJ with well developed Fi. Having your tertiary function so well developed is going to be far more likely than your inferior function. Se, Fe and Ti being low basically rules out ISFP and ISFJ.
I see no reason to think INFJ at all. Besides Ni they have all of your weakest functions.