TuMMy to BacK at 4.5 months

Tonight Kelsey rolled from her tummy to her back . I've been hoping she'd figure it out soon. She will roll over on her tummy while trying to fall asleep or WHILE she's sleeping and she gets herself all worked up. Hopefully now when this happens she'll realize that SHE CAN roll herself back over. NOW, she can SLOW DOWN with the milestones. I want my baby to stay a baby for as long as possible!!!