D.B.
Call the doc now and go to the hospital. If this is really labor, you really need to be there so that they can stop the contractions. It is too early to have that baby. His or her lungs are probably not ready and it could be a long haul in the NICU.
Please, don't hesitate here. If they send you home with Braxton Hicks, it will be fine. If you are in labor, they can stop it if it hasn't gone on too long. Labor is like a pebble rolling down a hill. If they can catch it before it gains too much speed, they can stop it. If it goes too far, they can't. Best to get in there and let them monitor you!
Let us know!
Dawn