Pre term labor?

Yesterday I was having cramps & pressure, called my doctor, went to L&D & I was having contractions every 5-6 minutes, I was given IV fluids & they also did a swab to see if I was in pre term labor & an ultrasound of my cervix, the cervix was closed & no labor, the IV fluids stopped the contractions. They said I was dehydrated. Well I've been drinking water all day & night & today I'm starting to have the same feelings as yesterday, like they are starting up again. I'm 32 weeks, waiting on a call back from my doctor. Anyone else have this happen & DIDNT go into pre term labor? There's no way I'm dehydrated now, I just feel like they're coming again.