keep thinking I suffocated baby

So every night my husband and I are alert and awake when we put our LO back in her crib to sleep. But for some reason I've been waking up randomly in the middle of of the night thinking I fell asleep with her in the bed and suffocated her. Last night I swear I was holding her head thinking oh my gosh she's dead she's dead only to lift up my shirt and realize I was holding my boob!!! 😆