Severe cramping at 11w

So according to my LMP I'll be 12w tomorrow but baby measured small so I'm 11-12w. Anyway I'm having bad stomach pains, like bearable at times and others I have to catch my breath. Bad. I left a message on my doctor's weekend answering service a few hours ago but no call back yet. I'm not bleeding, so am I fine? Just not sure what to do. :/