For anyone interested this helps me tremendously! I was originally a stomach sleeper too so I feel your pain!
Odd enough while in bed I feel sore in my lady parts, like someone kicked me there? I am assuming it is blood flow and baby but I end up going to lay in the recliner at times b/c of it!
https://smile.amazon.com/Comfort-To...d=1404153058&sr=1-1&keywords=comfort+u+pillow
I put the U at my feet so I can use my own pillow. It helps the hips if you have issues with that but further along you go, the numbing will happen. It is just starting to become an issue for me at night again in this pregnancy.