My midwives told me with DD that if i had more than 4 bh ctx in an hour i should call them. Maybe you should call in and check with them? My BH NEVER hurt until the night before i went into labour and i think they weremore prelabour than BH if you know what i mean. Make sure you're well-hydrated, dehydration can cause crampy contractions, as can UTI's.

Bx