Yeah, babe, you're panicking. Don't worry. And stop smoking weed for now if that's aggravating the problem.

Take some deep breaths, in and out, and concentrate on just the breathing. Try and let all other thoughts go out of your head. You're not dying and not sick. You're just obsessing about those thoughts. Time to get up and walk around, too, and get away from the PC, OK? Maybe eat something healthy?