Slept through crying for the first time

Yuta
I slept through my 3 month old's crying today, I was napping on the couch w the baby monitor right there and Hubby was in the backyard and he heard her but I didn't wake up.  Luckily he had the windows open or he probably wouldn't have heard her.  I feel bad.  I guess it makes me feel like I'm kinda disconnected from her now or something, I'm pretty sad about it.  Looking for some encouraging words from other mamas, please.