Hey...Lately ive been really scared..For the last 4 days ive been felling a Out of breath...strange presure sort of thing in my chest..It comes and goes but its really got me concernd...I first noticed it when i was taking Xanax to help me sleep...Im not been prescribed xanax but my father gave me some to help me get to sleep for my insomnia....And i looked up it can make BP levels go high..I havent taken any for a few days or Valium! WHat do i do...? will i die..Is it heart related?