Extreme hip and lower back pain!

Lisa
I am 39 weeks and my hips are constantly throbbing!! Constantly.....I have horrible lower back pain that NEVER let's up and 2 days ago I started to feel sick and just off. Diarrhea started today also. But NO CONTRACTIONS! just the occasional braxton hicks which I've been getting for months. Does anyone have any ideas how to relieve this hip and back pain! Heating pad isn't doing much, tylenol doesn't touch it....I'm have an appointment on Friday but I need to be able to function! I have things to do and I just can't right now :(