Pelvic Pain & Cramping

I'm 34w1d ftm, So for the past 3 days I've been having pelvic pain, sometimes it's bad and sometimes it's pretty tolerable. But today it's bad and I'm having some cramping with it that isn't terrible but so uncomfortable and achy that I want to cry because I just want it to stop so bad. Should I call my OB and tell them? Idk what's going on. I know I'm getting closer so my body's starting to prepare but this pain is getting bad..