Lol oh geez

About a week ago I made a post about gow my baby is 4 months old and not rolling yet. Well yesterday she rolled over all on her own. Not even an hour later she rolled perfectly from back to belly... several times. Well shes no expert at tummy to back since she's technically only did it once alone. Well now, at night she keeps rolling over on her belly and she can't roll back. Its been a loooonnngg night! Lol why must she be good at the hard thing first?!