36w 1d and cramping

Kristen • Married 4 years to my Marine. Oklahoma born & raised. Cherokee blood, barrel racing, fishing, modeling, gym
So I am starting to have cramps like I'm about to start my period. I had a dr appt Monday and I was dilated to a 1. I drink plenty of water so I know that's not it and they're irregular. I've had contractions but they're more of a dull pain instead of a cramp. Any idea what this means??