Diarrhea starting to worry me....

It’s real bad ladies, TMI!!! But been making a dozen trips within the last several hours.... been still drinking water and trying to snack to stay hydrated but I’m getting really dry mouth still and thirsty, can’t sleep for making the trips to the toilet.... also starting to feel tummy aches coming on... I’m at risk for preterm labor, but I’m only 29 weeks right now... Do you guys think I should go to L&D... my OBs office never lets me ask questions over the phone, they always say “you’ll just have to come in and see the doctor.”