Do you use a pregnancy pillow?

Dancether

I am normally a stomach sleeper, though I had spent some time pre-conception trying to train myself to sleep on my side.  I am not sure what's going on lately, but I have been waking up in the mornings feeling incredibly sore in my stomach.  I'm not sure if I'm twisting weird, or rolling over on my stomach, or what.  I also wake up incredibly stiff and sore on the side I am sleeping on.  I am considering getting a pregnancy/maternity pillow.  Does anyone use one?  What kind do you recommend?