33 weeks preggy period..

Here's the biggest problem, I have a HUGE BELLY! I'm not supposed to sleep on my back because the weight of the uterus supposedly cuts off blood supply. Obviously sleeping on my stomach is out of the question. It seems like sleeping on your side while pregnant should be comfortable but it's just not. To get my belly to touch the bed I have to twist a little further over causing either odd pressure on my shoulder or a twisty uncomfortable spine. I've tried to add a pillow to support the belly but it is even more uncomfortable (mainly because the pillow is probably too big). To make it worse the baby is the most active while I'm laying on my side so the constant pokes and jabs make it even harder to sleep.