Okay Mommies, I need help. I've had some BH contractions since 21 weeks (I'm 32+3 now). The last 2…

Okay Mommies, I need help. I've had some BH contractions since 21 weeks (I'm 32+3 now). The last 2 hours I've been getting the tightening of the BH, but I'm also getting a pain like menstrual cramping and my lower back is starting to hurt. I'm having a lot of pressure in my low back and pelvis and pain in my pubic/vaginal area. I've also noticed when the pain and tightening start, my girls get much more active. The pressure makes me feel like I need to have a BM, but there's nothing there. No gush of fluid or leaking. Should I be concerned or just wait it out?