Hurting/cramping

I keep having this pain in my lower stomach on my right and left side. It’s like it take turns. One minute I’m hurting/cramping on my right then a few minutes later it has switched to my left. I’m 35 weeks today. I’ve used the bathroom 2 times in the last hr. I also had intercourse last night but didn’t have no pain or anything until now so I don’t think sex has anything to do with it. Is this normal?