Both my kids we're tummy sleepers. I or someone held both of them 24/7 for the first 2 1/2 weeks because they woke up the minute you put them on their back. I would sleep propped up on the couch with DC on my chest. I tried everything, sleep positioners, heating pads, miracle blanket, elevating the head of crib, rocking bassinette, carseat, eliminating milk from my diet and talked to ped about reflux. I finally gave in with both at about 2 1/2 weeks because I couldn't take it anymore and let them sleep on their tummies. I did discuss it with my ped. and he said since I had tried everything he would allow it but doesn't recommend it. Both could lift their heads at this point, and DD was rolling over at 4 weeks. I finally could sleep in my own bed without a child on my chest for about 2 hours and I could get a few things done during nap time too. I hope you can get a break soon. I know how exhausting it is. Best wishes.