So my baby is 3 1/2 months and he hates lying on his back. Ever since his first day home we have always laid him in an elevated angle in his crib by using pillows and a thick beach towel at one in of the bassinet. He is becoming too long for his basinet to stay at this angle. Doesnanyone eslenhave an infant that does not do well.on their back. He always spits up a lot.of.milk when lying flat on his back. Its as if the milk is just coming all the way back up from his stomach like.his flap does.not.close after he eats to keep.the contents in.