Should I go in?

So I don’t wanna be one of those chicks but here I am. Last night my one and a half year old was wanting to bump our bellies together. I thought it was cute and saw no problem. Well he plopped on me twice pretty good. Like all his weight. Well then probably about 30- 40 minutes later I started getting sharp pains in my belly. Trying to think nothing of it I just rubbed my belly. Well when I went to bed I still had the pains and back pain with it. Baby was moving so I figured if I could get through the night I will call in the morning. We made it through a rough night and when I woke I didn’t have the pains. Now though I feel like I stomach gets hard when I stand and randomly sitting. I have taken it super easy this morning. Trying not to stress and all that. Baby is still moving like crazy which I take as a good sign but I even feel cramping by my cervix or in my vagina (idk how to describe it) Do I just go in? I’m 28 weeks tomorrow.