Preterm Labor question

So I've been gradually losing my mucus plug and my water hasnt broken or anything so that's good. But I have this gut like feeling and like sort of light crampy feeling in my lower pelvic area. Could this be the very start of possible contractions? I've had a few Braxton hicks but not bad. I guess my feeling is more like I have to poop but I dont have to go If that makes sense?