I didn't feel like I had tummy tightening for BH but it's definitely like period cramps for me. There were twice the cramps were very intense but they didn't sustain more than 30mins each time. The rest of the BH were mild and honestly the earliest part of my labour contractions felt the same. The difference is that contractions continues and increases in intensity, the pain doesn't go away like BH. I only had lower back ache the day my water bag broke.
you feel like muscles tightening across your belly
sxrxanyx