So much pressure down below

So I’m convinced my dr got my due date wrong like she did with my last pregnancy. I know it’s hard for them to pinpoint unless you somehow know exact day of conception.

Anyways I’m some where between 35-36 weeks and last scan I had at 19 weeks baby was measuring a week ahead. My last baby measured 2 weeks ahead and came at 38 weeks. I’m basically posting to complain that I am feeling so much pressure and crampy pain down low in my vag and even my butt area. TMI but it’s very uncomfortable and painful. Anyone else?!