Hurting badly

Waking up this morning I had the worst pressure in between my hips, this pain carries over to my whole back. I called the nurse around 12:30 left work at 2:30 and things are still not better when on the phone not thinking anything of it, yesterday I took a fall down a couple of steps.. I work a pretty hard job, and there’s a lot of bending and heavy lifting involved. I came home and laid in he position I was told to lay in for a few hours and I took Tylenol. The position didn’t work I don’t feel like and I’m still in a lot of pain. I’m almost 25 weeks(on Monday) and I just don’t know what to do, any ideas?