Gas,diarrhea,bloating

Since I woke up this morning I have been so uncomfortable I keep getting gas burping and farting all my burping taste like old popcorn and I keep getting diarrhea and ny stomach is bloated and keep feeling uncomfortable on and off my peruod is due tomorrow and I honestly don't remember ever feeling like this vefore a period I usually just get backache before a period ny stomach feela like im 7 months pregnant