Help! Pain when sleeping!

Beth
Ladies I need some advice! Over the last week sleeping has become more and more painful. I wake up multiple times in the night because I am in so much pain with my back and my right hip. I'm almost 26 weeks and have been sleeping with a pregnancy pillow since about 9 weeks. 
I do suffer from pelvic girdle pain but so far during the day it hasn't been as painful as it was in my first pregnancy. The pain at night however is unbearable, I don't remember it being so painful with my first! Any advice on how I can stop the pain and get a reasonable nights sleep???