Help?

Mamas, i need your help and input ASAP! I have never been this far along in pregnancy before and the last time I was pregnant pregnant was 14 years ago so things are fuzzy for me. Anyway, at my last hospital visit. I was told i was 75% effaced. This was sunday. Right now, the pressure down there is super bad. I mean so bad that i cant walk. I have also been having pulsating pain down my spine. What do i do? Hosital? Urrrrrrrghhhhhh help! Waiting on doc to call me back