I think its not necesarilly brain damage but your brain is just trying to heal itsself of the traumatic event, not to mention the minor abuse of MDMA alone can cause some fuzziness. I have a story similar to yours in some ways. It could help because I had gotten through it relatively okay.
In august I had gone to a music festival and done mdma 3 consecutive nights, on the last night i took MDMA and acid. I had gotten these mdma pills from a fellow festival goer who was camped close by and offered to sell me some pills. Now these pills were huge, at least twice the size of any other pills i had seen (im talking about molly caps not E) and she sepcifically told me not to take ore than one at a time. It was a good thing i listened to her, by the time I had started to feel the acid I couldn't believe how high i was, so much higher than I had ever been before to the point that my CEVs were no longer close eyed.... and when I took the cap (really wasn't thinking at that point I just knew that I would probably get into a bad trip if I didn't get my mind out of its loop) it hit me within 20 minutes and I rolled as hard as I hard rolled for the first time. (ridiculously intense experience that I doubt ill ever be able to recreate ;P) After this festival I had about 3 days to recuperate and then I went to go see deadmau5, in which I had a lot of alcohol, some herbal crap from a local shop that was supposed to act as something like mdma (it only made me want MDMA), and two unknown substances that were sold to me as mdma. The first one was slightly orange and DEFINITELY not mdma but me being in my unsober haze thought "fuck it" and railed some, then I took two caps of real mdma. After the concert I went home and at around 3 in the morning i tried to get to bed. You would think after all that I would practically pass out but no, I couldn't fall asleep all night i stayed awake with my heart pounding, thinking I was going to die, experiencing horrible anxiety and reslessness. My pupils were big until 8 in the morning...which was very strange seeing as the would normally go back to normal within an hour after having come down from REAL mdma. I had to have minor surgery that morning as well...it really wasn't a fun day.
After that day I went to bed at a reasonable hour and woke up the next day feeling horrible, dead on the inside, like I couldn't really understand what people were saying to me. Everything looked as though I was in a dream, i was constantly confused, serious sleeping problems I basically would sleep 4 hours a night for a month straight, demotivated, sluggish, and I had made my social anxiety so much worse. I didn't leave the house in the day time, I basically shut myself off form everything, I came out a couple times to hang out with my friends but when drank a little bit and smoked some weed I felt so lightheaded, and there was this intense pressure in the back of my head. I knew that I had done some serious damage from all that partying. These effects lasted a good two weeks, I also caught the worst cough I had ever had,....idk if its related or not.
So what I tired to do was really not think about it, I started to longboard around A LOT. It was something that made me feel better and it was physical excersize. It got me out of the house and outside in the sun, I got through these effects slowly but they were all gone by the time september hit.
What Im trying to say here with this whole TL;DR comment is that if I were you I would find something like a hobby, something you love doing and get immersed it in, try to forget about the whole fuzziness and try to live your life as normally as possible, be that going out with friends, smoking weed, whatever. Please don't worry! THIS WILL GO AWAY, you just need patience. If you convince yourself it wont go away then it wont. A lot of this is all just in your head, in the way you see things. Maybe get some perspective?
And if you're looking for a drug to try and help I'd def go with mushrooms, never do I feel as clear and comfortable with my life as I do after taking mushrooms, even if the trip is a hard one I accept it later on and realize a lot of things about myself.
but as was said, abstaining will help you. I've been in your situation, and what helped me is simply cannabis when I needed *something*, and at other times I DID indeed need a psychedelic experience to help me out BUT keep in mind in these situations I would have not tripped in over a year and once even 2 and usually developed a fear of tripping for a while (until I broke that with a good trip, but this can always repeat).
