M.W.
One of my twins had reflux. I used the boppy for a while to get him used to being out of the car seat/bouncy seat/swing. Once he started sleeping pretty good in that, I used a wedge in the baby bed (on top of the mattress), and put the boppy down under his behind (with his butt in the hole and his legs over the round cushion part) so that he wouldn't slide down off the wedge. It didn't take very long before I was able to remove the boppy and wedge and I put a very flat pillow (that was as wide as the bed) under his sheets so that he could be elevated just a little. Once he started rolling over from back to belly, I removed the pillow. Good luck!