I'm 32+2 & for the last couple days my tummy has been tightening up every 20 or 30 minutes, with constant back pain. The tightening isn't painful, but I read that BH shouldn't happen that often and they're not predictable. Should I be worried, or is it just normal? I don't want to stress since I'm so far along & I can feel my baby boy moving... any advice for this FTM?