I can't sleep!!!

I'm 35 weeks and I'm absolutely knackered but I can sleep at all. I'm tossing and turning and last night I managed to doze in and out of a light sleep a few times but tonight I really really can't. I have a huge king bed to myself and my fiancé is in the spare (snoring issues) and I have a pregnancy pillow, but I can't seem to nod off at all. Eveytime I try to move positions to see if that helps my whole body locks up and I'm in so much pain trying to shift my legs or my body around. Getting up to go to the toilet during the night is mega painful too my body won't move and when it finally does it's so stuff and painful. Is anyone else having these issues or am I just being pathetic? Please help!