39 weeks.. labor symptoms?

Last night out of no where i felt the urge to use the restroom turns out i had diarrhea, not a lot though i got up to the bathroom 4 times with the urge to push and had cramps; today im having period like cramps and I also have lower back pain feel like im about to get my period. Also feel pain around my pelvic bone but kind of crampy down there. What could this be? Signs of labor or false labor? Are these contractions? Im a ftm so i dont know what to really expect other than pain.