Mine were all over my belly too, as well as the lower back. I had them from 14 weeks on. Usually not painful, but at times they got painful and VERY frequent (like every 5 minutes or less), so they sent me countless time to the OB's office or the hospital (depending on the time). They didn't go away with changing position either...
So after all that, when the real deal came along, I thought it was false labor again and didn't want to go to the hospital. The labor pains weren't that different from the Braxton-Hicks for me AND they were less frequent! Finally, after 8 hours (!), my hubby convinced me to go to the hospital, and I went reluctantly. My contractions were still only 7-8 minutes apart. Well... I was at 7 cm! Good thing I listened to him or I would have had the kid in the car! 😱
The OB told me that I just had an irritable uterus. Matches my personality well 😀 . I ended up on terbutaline and modified bedrest, and I did carry him until 37 weeks.
Just watch out if you're still preterm, because preterm labor may not be as painful as you'd expect, and if you're too dilated they won't try to stop it. You only have one chance!