Vaginal pressure??

I’m currently 19 weeks pregnant and I’ve been having HORRIBLE vaginal pressure and pain, every time I move it hurts. It started last night, I’d woken up from a nap I took with my daughter and I tried to get up and grab her from her crib but the pain and pressure was so much that I couldn’t stand. I haven‘t had any bleeding or loss of my mucus plug, just some intermittent cramps in my lower abdomen and back and this annoying pressure/pain. It feels awful and I don’t know what to do. I called my OB and they never got back to me so now I’m just sitting here wondering if an ER visit is in order or if I should sit and wait?