Is this normal?

I’m 30 weeks and woke up in a lot of pain. I had rib surgery before I got pregnant and I have a lot of scar tissue from them cracking my chest and now that baby is bigger I’ve been having some back and rib pain. I woke up with my stomach hurting and tight but I’m used to that I’ve had HG my whole pregnancy and Braxton Hicks started at 17 weeks. I feel like I have to poop but can’t. And when I sit on the toilet to try to go I get a pain in my cervix area. This is my first baby I’ve made it this far and so it’s new. Idk if I should call my dr.