Sleeping on my side...

Apparently sleeping on your back is not an option while pregnant because it puts pressure on a main artery in your back and doesn't allow the optimal amount of blood flow to the baby. I guess this is extra crucial for me because I already have low blood pressure. The problem is, it is not comfortable to sleep all night on your side. I wake up now multiple times a night with my hip hurting so bad, so I flip to the other side and the pain just transfers to that side. I try putting pillows in bed to prop me up on my side, to put between my knees, under my hip and under my belly...but nothing helps! I can only imagine this is going to get worse :(