normal for 30wks?

the past week I've been having not quite diarrhea but the cramps of diarrhea & looser stools, today I actually had diarrhea & I don't understand why. I'm not sick? I drink plenty of water to stay hydrated. also today I have a shooting pain on the inner part of my left thigh, what could be causing that? I've had some braxton hicks but nothing consistent. tia!