Hey man, after my 5th LSD trip I had a similar experience, two days after the last time I was feeling like the trip hadn't wore of completely, so I ended up getting wasted and had an "attack", I was pretty close to having a hart attack and since then my mind was trapped in a loop of racing thougts.This lastes about a month, but then everytime i smoked or drinked, I would go back to that same place, it got so bad i has to go to the psychiatrist and ended up droping school for a semester. Then decided to quit drugs and im feeling quite ok since.So my tips to you are:1) Leave drugs for a while until you feel confortable in your on skin again, I know its hard because of friends and stuff, but do not take mental sanity lightly, your body is your vehicle through life, and would recomend taking care of it.2) In my case sports helped me a lot to get back to "normal"3) Keep in mind that we are always changing, it seems to me that what caues anxiety is the desireto go back to normal, as you were before this started hapening, but change is part of life, embrace it and try to do things that guide this change in the direction you want to go. If you feel somewhat anxious or persecuted, just embrace it and say this is how I am now, and its ok.4)Also try and think about what your relitionship to the drugs are, in my case I realized that I had a problem with them, this being i blaked out every time I took them. So it is not bad to evaluate why you take them.lots of luck