BH or labor contractions?

I’m almost certain these are BH, but as they’ve been getting worse I’m not super sure. I’m a FTM and I’m 33w4d, so I’ve never been in labor, and have only had a few BH. Basically I’ve had a feeling of menstrual cramping, and a pressure that takes over my whole abdomen for about 30 sec - 1 minute. At first it wasnt painful, it would just be slightly harder to breather during the contraction, accompanied by menstrual cramping, but the last 2 were way more uncomfortable, and slightly painful. I’ve only had about 4 in the past hour though, so I’m not super concerned atm. Just curious if anyone else has BH that sound like this.