Bad pelvic pain

I've had pelvic pain since I was about 5 months Prego, but now that I'm 8 months the pain has gotten a lot worse!! I know my body is getting ready for birth but it's to the point where I can't even stand or walk. I get up from sitting or laying down in really bad pain and can barely walk. Does anyone know what can help with the pain? Or if I should ask to go on maternity leave already? It's really hard for me to walk at work 😕 ugh