Rolling Over

rexiesmama11

My baby is just 4 weeks old as of this last Wednesday. We put her on her belly for tummy time today and she rolled onto her back. I thought it was a fluke but she ended up doing it a few times during tummy time. Call me a paranoid-first-time-mom but should I be concerned that she's rolling too soon and doesn't actually have the muscle control? I'm so worried she might hurt herself but can't decide if I'm being paranoid or not. I know the milestones can happen at various times for different babies and still be "normal" but the book I have has rolling from tummy to back as a 4-month milestone. 1 month is so much earlier than that!