IAM 34 WEEKS PREGNANT. Trolls. plz help.

Iam 34 weeks pregnant with my second baby and iam due on 16th august i had a first csec iam favourably looking for a vbac. And npw tat im left with justa few week since a week im observing my stomach feels very tight on top and its very much like pressurised at the bottom my doc has to say abiut this is just nothing she did an internal check up and said my uterus was high and closed. And i also havebeen having my gastric tables pan40 doesnt help me. Im also doing my regular pelvic and labor exercises along with a 15-20mins walk. I have slight sugar traces so im striclty on a diet for it . Now iam just concerned qhy is my stomach so hard at the top as if my orgns have no more space to expand. And in a few minutes from then starts to release itself. Its happening quiet much in a day. I didnt feel all this or maybe didnt notice it much in my 1st pregnency but the second one is putting me trolls.. plz help...