Diarrhea for 2 weeks

I’m 27 weeks pregnant and have been having diarrhea pretty much every other day for the past 2 weeks. I called my OB about it and her nurse said that sense I’m not having any pain or contractions then it isn’t pregnancy related so I would have to make an appointment with a GP. I made the appointment but it’s not for another week so I just wanted to know, has anyone else had this problem? I didn’t have Thai issue during my first pregnancy.