But if it lasts more than a few days you should let your doctor know
I rather have watery diarrhea then vomit you are super lucky to just be getting diarrhea and if you can't drink water try vitamin water or gaterode
Im 22 weeks now but I had the same problem, don't stop drinking water though you'll end up getting dehydrated and that's bad for the baby. I was sick for the entire first trimester and lost ten pounds. Some people just have worse morning sickness which doesn't have to be vomit it can be diarrhea too
Try eating foods high in fiber and just make sure you don't give up on that water. I would ask a doctor even just a family practice doc, it could just be a stomach bug