Ive been taking lexapro for anxeity for 4 months now, and the past couple of weeks have been good. But last night I was trying to go to sleep and all of a sudden I had werid sensations in my head. I really cant explain it. I kept thinking thoughts like I was losing my mind. I was sweating like hell and couldnt sleep. I had chills at one point and then I would be hot as hell. Finally I fell asleep. But it scared me to death. I have been smoking weed again for a couple of weeks now. I dont know if that had anything to do with what happend last night. Anybody had experiences like this?