37 weeks ...Pains In my abdomen

I keep having this unfamiliar pain in my lower abdomen!! Stretching from the front to the back... I can't explain it 🙆this is my third baby and I think I no what contractions feel like but idk?? It's been going on all day. I drink water and nothing's stopping it!! It kinda feels like a stretching ligament type of thing ?? Any help or responses on this subject would be great💞 reaching out to my fellow moms .. I need your opinions thanks in advance