Sids fear (sleeping on belly)

Ok so it happened my baby started rolling onto her belly finally when she’s in her crib. This was during a tantrum not during actual sleep but she still can do it. I’m scared now that she’ll start rolling in her sleep and not realize it and I’ll wake up to a sids baby. I put her to bed on her back but what if she rolls in her sleep and doesn’t know to roll back over consciously?