feel like the worst mommy ever!!! my daughter is almost 2 months old and is starting to roll.. we…

feel like the worst mommy ever!!! my daughter is almost 2 months old and is starting to roll.. we cosleep with her and last night I was cuddling with her and fell asleep and she was on her tummy, she rolled to her back and to her tummy again and fell off of the bed :'(( now she will sleep in between my fiance and I but I still feel horrible!! she was okay it just startled her :( I feel bad :'(( my poor baby!!