Hideous gas and cramps, plus the usual early morning diarrhoea that I get more often than not. Sometimes, if I'm unlucky, it lasts until midmorning or returns around teatime.
I'm genuinely sorry if I come across as harsh sometimes, it just gets frustrating from time to time when people don't seem prepared to accept the advice being offered. That's totally on me, and generally means I need to focus on working on my own troubles for a bit.
At the same time, though, what you're feeling is only a big deal in that it's distressing you so much.