Why Did I Panic About My Son's Whereabouts Last Night?

I just remembered that I woke up last night and in my half sleep state was like where is my son?! I'm like he's gone and I panicked a little Cause he wasn't with me and not In his crib and I got up to go see if my mom had him and i'm literally 75% still asleep and then I must of realized before leaving my room that he was at his dad's and went back to bed lol! I just remembered feeling like how some of these kids who disappear in the night without a trace and I thought someone came in my room with me asleep and took him 🙁 the worlds a scary place to raise precious babies.