Baby fell

My baby is 8 months old. She was sleeping on the couch, i got up to get the remote from the other couch and as i was walking back to the baby she rolled over and fell. She only cried for maybe 30 seconds, and fell back asleep. I do have carpet at my house and besides that there was nothing else she could’ve hit her head on. I’m just freaking out about it and i don’t know how to know if she’s okay. There’s no bump or anything and it might just be me overreacting.