Out of the blue DS (21m) demanded a pillow from our bed the other day at nap time. I gave him DH's. Now he won't let us take it out of his crib! The problem is it seems like it's much too thick for him, even though it's pretty flat. He starts out sleeping on it, but ends up smushed up against it. I'm kind of worried that I messing up his neck with this one. I'd like to get him his own pillow and would really prefer an organic one given how much time he spends sleeping. Should I get a toddler pillow or search for a flatter regular pillow?