My little girl is three and a half months old. I have noticed in the last month that her head is flatter on one side because she is laying on it all the time. Since she was four weeks old I have always tried to do tummy time. However she is not a fan. Some days she will be ok with it and others she fusses the minute I put her down on her tummy. Her pediatrician says it will even out once she starts sitting up. With the research I've done online this is not always the case. My question is.. Is there a lot of moms other there that have experimced the same thing? Did your little ones head reshape on its own or they have to wear a helmet?