I used to be a very, very, smart, active, energetic and healthy person. I took a strong dose of LSD 11 days ago and it was my only experience with drugs in my entire life. Since that I feel very bad. It's hard to think, my mind is heavy and foggy. My friends report I'm apathetic and I fell just like I've became a bit retarded. I also got some photophoby and a feeling of derealization sometimes, but I can deal with those. I know the drug is out of my system so...
What could have happened, medically talking?
Will my condition improve or I messed up a good brain forever?