Getting concerned.

Taylor • 25 💕 Mother of 1 ❤️
This is a bit TMI but I really need help. I'm high risk. I've been on bedrest since 19 weeks (27 weeks now) due to an incompetent cervix. 
Friday night I was not feeling good at all!! I had diarrhea & vomiting. I just went about doing what I was doing. Showered & washed my hair..  & tried to just relax.. then it started up again. I tossed & turned the entire night couldn't get any sleep. Saturday, nothing happened.. Sunday I started having strong Braxton Hicks. They weren't consistent. So I didn't get worried.. then Sunday night it started up again & this morning, again.. 
I've read diarrhea is a sign of preterm labor. 
Is it just food not agreeing with me or is it a sign of preterm labor?