Contractions 10 minutes apart

I am 28 weeks with twins. This morning around 6am I stood up and a gush of water filled my underwear and ran down my legs. I was not in any pain but I still called my doctor and told her.she told me to go to the ER to OB. There the monitored the babies, did an ultrasound, and check to see if I dilated or if my water broke. I was there only about an hour and half and was told everything looked good the babies, water did not break and no pain. I am now home and having contractions every ten min apart. The contractions are strong and uncomfortable but standable. Would you go back to the OB if contractions continue or wait until there is pain with the contractions?