Contractions?

It’s late but i was outside pretty much all day and I came back in ate showered and laid down and feel asleep for a little bit. I’ve been crampy and my belly is tightening and it feels like I have to poop and I did but it only helped a little. The pain was pretty persistent. I’m laying down again and it’s okay at the moment but not 100% comfortable. I’m 38 weeks pregnant.