Did your first child arrive early?
I've had constant bh contractions with all my babies all through 2nd and 3rd trimesters. Crampiness at 35-36? I probably did too. And my babies all went to term. I really wouldn't worry about it. My homebirth midwife will actually deliver at home starting at 36 weeks - so it's probably a relatively safe gestational week, for the most part. Of course it is ideal to go until at least 38, but hey, 36 is better than much earlier. If you are super worried and feel like your baby is too early and are having too many contractions, have you tried emptying the bladder, liying down and drinking a lot of water? As a last resort, you could try sipping a little bit of wine. When I was having strong contractions at 33 weeks with my last babe and drinking water, etc. wasn't working, I made myself drink a few gulps of wine and the contractions went away immediately.