Sleep regression got the best of me

So I took a nap with my son today and when I woke up he wasn’t next to me.

I freaked out jumped out of bed to find My sister was playing with him on the swing outside

My sister said that she heard him crying in our room for some time so she came in to check on us and said I was passed out right next to him. She said she tried waking me up but I would not wake up and that he was crying for a while.

I feel like complete shit because my son was crying right next to and I didn’t even hear him. Like what the hell!?! I didn’t even know I was that exhausted! Now I’m sitting in my bed crying because I feel like such a bad mom. Like who doesn’t hear their baby crying right next to them!!!