I am surprised to see so many people having similar symptoms I'm 29 and have been having this happen off and on for about a year now my doctor was originally trying to tell me it was acid reflux disease but going to the hospital a few times they leaned more towards it being is and general anxiety disorder the very first time it happened it woke me out of a dead sleep with extreme stomach pain like my stomach was about to explode I flew to the bathroom pooped my brains out and threw up twice then was exhausted and passed out ever since then it was to the point it happened almost every morning making me late for work because I would get tingling in my face and sweating bullets then couldn't get off the toilet and nasau I do take methadone for opiate dependency and some days I would take it and it would make it stop yet some days I would be fine take my methadone and it would trigger it I started coming down on my dosage and have since cut it in half and it had stopped happening for about two months then today I had recently started working out again and worked on my abs today after doing crunches until I no longer could and taking a shower it started out of nowhere and won't usually stop until I'm completely empty and then once I am or even after committing as well I get extremely weak like I'm gonna faint in which time I will go out to my truck put the heat on and hang my arm out the window with a cigarette and pass out and when I awake I feel fine although sometimes I've tried running out to the truck and had to run back in cuz I wasn't at that stage yet and even opening my eyes or sitting up has caused me to go from feeling exhausted but normal to that panick anxiety feeling like I'm about to go to the bathroom in my pants plus nasau causing me to run back into the bathroom. I still can't figure it out and thought I might have finally been rid of it until today