Do any other mamas have this problem?

I feel like this is going to sound so stupid, but so do any other moms feel like they have a tiny bit of PTSD from the newborn stage? My son is 5 months old and the light of my life. When my husband had to go back to work I was basically single parenting my son all day everyday. I spent the first two months getting maybe 2-3 hours MAX of sleep every single night if I was lucky. Just waiting till the weekend when my husband would let me catch up on sleep. I have bad insomnia problems anyways. But now, he sleeps through the night and it’s great. However, he has bad nights sometimes (rarely) and I know that is completely normal. However, when he’s screaming and inconsolable and it’s past his bedtime I will literally start shaking with fear. It’s like my body gets sent back to the newborn phase and my brain always thinks “yep this is it, he’s going back to never sleeping again I’m going to be forced back to that depressing place again.” Like it’s a form of trauma I swear!

I just need to vent, is anyone else like this?? Like was the newborn stage traumatizing for anyone else? I feel like I’m a crazy person.