Water leaking??

Grissel • ;)
So I'm 38weeks and have had some really good contractions and diarrhea since yesterday. The contractions are random even though some are quite strong. I think I'm leaking water but I'm not sure. My underwear is constantly wet but it doesn't seem to be so much that I leak through my pants. Is there any way of knowing without having to go to l&d. I just don't want to have to go just to be sent home. Thanks!