I am a mom of a 17 month old. I am concerned that she bangs her head against her crib. I have raised the bumper to the crib higher to buffer some of the impact but my daughter sits up against her crib and slams her back/head against it really hard before she goes to sleep and even during the night most nights. I spoke with the doc and she says that I shouldn't be concerned. I have done research online and everyone says to not be worried. I am worried that all the banging might cause brain damage. IS there anyone who can recommend a doc or something I can do to stop her from doing it so often or so hard??