28 weeks.. I'm having this weird pain sometimes when I'm sitting upward I feel a lot of discomfort…

28 weeks..

I'm having this weird pain sometimes when I'm sitting upward I feel a lot of discomfort in my stomach(like that feeling you get when you get kicked in the stomach )idk how to explain the feeling... and I have to lean back or lay down. now I'm laying down and my back it hurting and my lower stomach. is this normal