Braxton Hicks vs Pre-labor?

Br

Hi mamas!

I’m 35w6d due on Oct 19, and I’ve been having what feel like strong BH contractions for 6 hours now. They aren’t painful, just really uncomfortable and my stomach has been hard as a rock pretty consistently since about 3:30pm. I took a nap for a couple of hours and they still haven’t gone away. Is it normal to have BH for this long in one day, or does this sound like an early labor sign?

I’ve been drinking a lot of water bc I thought maybe I was dehydrated but it’s not working. Pls help!