False Labor/ Braxton Hicks?

So with my first pregnancy, I never had preterm labor or contractions at home. My water broke then I went to the hospital. She was born at 38+3.

Now I’m 36+2 with my second and I’m assuming I’m having false labor, but I don’t know. From about 12-9AM I was having short contractions. They were sporadic at first, but then every 20 mins for the last few hours. They were short, only like 15 seconds, but painful. I couldn’t walk through them. They never got more intense, though. I also haven’t had any in a few hours.

I’m assuming it’s false labor, but have also read that the Braxton Hicks aren’t supposed to hurt.