anyone else?

Hi there. I'm just wondering if anyone else has had bad tummy pains/diarrhea (TMI-sorry) early on in their pregnancy? My first appointment is tomorrow so I'm not positive how far along I am. I did get my positive ovulation test on 8/28 though. But the first day of my last period was 8/2 (I have irregular cycles with the longest being 50 days. So I'm not even sure what to go off of. I think I'm 5 or 6 weeks.