I'm almost 31 weeks along and have had Braxton Hicks on and off since maybe 20 weeks. They where rare and no pain, and never lasted long. But for about a week and a half, more so the past two days, My whole tummy gets rock hard and I feel mild cramping pain in my lower stomach. I timed them, and they're definitely irregular, from 11 minutes, to 7 to 4 all lasting about 20 seconds each. Are these still BH or could it be real contractions?