I had my first panic attack when I was seven or eight and have had plenty since, so I know how they feel. I've never been diagnosed with an anxiety disorder (I truly don't have one) besides mildly moderate social anxiety. Haven't needed any medications for it, so I can't help you there. I can say that I don't agree with using drugs like weed, but that's simply my opinion. Trying more herbal remedies and watching what you eat, like Nath said, is probably worth a try if you want to not do pharmacutical drugs. But please, don't resist taking medicine if you need it.
Anyway... Yeah, after a while I've just learned how to deal with panic attacks. They still come around, but I can cope (stave off) with about 85% of them. Don't stress yourself with thoughts like, "I should be doing this!" My mom and I have a motto: "Do what you have to do; you can curl up in a closet afterwards." It's far different with an actual disorder, I'm sure, but it works for us.
Hang in there!