Day off today and the only real time I've been up on my feet is to run to the bathroom or to dink…

Day off today and the only real time I've been up on my feet is to run to the bathroom or to dink around the kitchen. Other than that pretty much have been laying down or sitting. My left hip is causing me excruciating pain to the point where I can't move or walk. It starts in my lower back then spreads down to my tailbone all the way to my left hip down to my knee. Any idea what this could be or how to ease it? I see my midwife tomrrow for other reasons but am definitely going to bring this up.

* I dont have a bathtub and I'm allergic to Tylenol