Drugs enduced hell

Hi fellow anxiety sufferers,
Im 24 and I am new to anxiety realm , it started heavily after i did drugs this summer , in particular i was stupid enough to take quite high dose of mdma which in the end i think turned out to be mixed with speed and then ruined myself with smoking couple big puffs of weed next to ecstasy , i got super paranoid , thought my friends were plotting against me did not almost know where i was, started mixing up words and my brain felt like half dead.. Classic bad trip.. But since very then i started feeling very bad and in the beginning it was kind of bearable and i even though i get better but then became more and more #######5 after i had panic attack once , i started thinking i have brain damage or schizophrenia and quite honestly sometimes i still fear of it. I went to doctor in a completely terrible state and the doc sent me saying this is anxiety to therapist who stated the same and convinced me, sort of , that there could not be anything else but anxiety. In fact now I realize that i always had it but much less heavy , i had crisises as well but never like this.. My question is wether someone ever experienced what i do ? Trouble staying asleep and insomnia , my thinking feels like i am becoming retarted , it feels like i cant speak to people anymore and every word i have to think twice before i say it, endless rehearsing conversations with myself inside my head and all types of "worst case scenarios" ,sweaty hands , mild depression and strange feelings of derealization as far as i understand, feels like normal every day things are strange, in the beginning when it all started and i got very started i was scared of people faces and how they were moving when they were talking to me , felt very psychedelic .. Long story short i feel terrible , still quite scared but managed to get my fear of my symptoms under control saying it is all part of anxiety and i have to say it did get bit better that at least i dont get this psychedelic , but this terrible feeling like brain damage that i cant normally communicate and i am very slow, strange feeling of distorted reality and insomnia, it all stays and its been already 3 month.. Most strange thing is that i never have panic attacks I almost dont worry or think about bad stuff but still feel terrible i feel tense all the time and worried and scared and depressed for no reason at all along with all other $#%^ mentioned above and being generally totally spaced out. Please tell me anyone of you experienced same or similar symptoms? I am very scared i am never going to recover although all docs said i will.. And another question , doc prescribed me lexapro or buspar , i can chose myself but i am terrified of both side effects , anyone used it ? Does it really help?

Thanks in advance and have a nice day

Fedor