brain damage!!

i don't know what's going on with my way of thinking. before, i am used to think things better and faster... random or not... but now?? i can't even know if what i'm thinking about is right or not. sometimes, i did things before i even realize it... my mind as always late... i can't process my mind...i'm always thinking nonsense things.. and i can't help it... i want to have my old thinking skills back!! i hate this paranoid and foggy head i have now...