Not sure if this is medical advice. But how do YOU know if YOU have brain damage? Did you have a scan? Or are you looking this information up online? If you feel that something is broken you need to make sure it is broken before you fix it no?... Also from my experience you should speak to someone also for the fact that the anxiety and depression you are feeling now could be what you were covering up while taking the drugs. Though I don't know all the details.