Mamma's out there- my little one has been able to lift her head up while doing tummy time on the floor.. but ever since a little after 8 weeks when we do tummy time she won't lift it anymore and just cries. She hates it now for some reason. She seems to have good neck strength when I'm holding her, and she will hold it for up for a little bit even on her own. Has anyone else their lo stop lifting or refuse to lift their head when doing tummy time? Any thoughts or suggestions? She is 11 weeks now.. and don't know if I should be worried or not and call the dr, or if I'm being paranoid.