Advice please! Last night, all night I had an upset stomach almost cramp like. I was supposed to…

Advice please!

Last night, all night I had an upset stomach almost cramp like. I was supposed to work today but I got there and felt awful, very nauseous and even a little dizzy. And I've also been getting a lot of Braxton Hicks.. I'm only 27 1/2 weeks but could these be signs of preterm labor? I don't want to freak myself or my boyfriend out over normal pregnancy symptoms, thanks ladies!