Help! Too freaked out to sleep.

My baby just turned 17 weeks and started rolling over last week, which is awesome! However, tonight she started waking up, crying, and rolling over in her crib when she’s upset. It’s really freaking me out because she keeps smushing her face into the mattress and can’t seem to move her head to the side. So it looks and sounds like she suffocating herself. I keep having to flip her back over, but I’m terrified she’s going to do it while I’m asleep and I won’t hear her. We do have a recommend crib mattress for infants and only a fitted sheet on the crib, but I don’t know what else to do. I feel so scared I don’t want to go to sleep!