Early labor???

Kim
I woke up at three this morning and my back, groin and hips hurt. Almost like I'm about to start my period. Not terribly painful, but uncomfortable. When I was lying in bed, I had BH contractions every 20 minutes consistently. I went to work, and although my symptoms haven't changed, I notice them less now that I'm busy. Have any of you ladies had this yet? The first thing I thought was early labor, but it could also be gas or normal prego pains. Let me know please if you had this and if it goes away or progresses.