So, my almost 5 month old has become a side/tummy sleeper. She’s figuring it out-and still sometimes cries when she rolls over on her tummy-but is slowly just learning to sleep that way. My question-her head is literally face down. Ive tried gently turning her head to the side-but she gets so mad and just moves it back. She has only a new crib mattress, and a sheet-so nothing to crowd around her face, but still. Is she okay to be sleeping that way??