Baby waking every two hours at 12 weeks?

I know this is totally normal, my question is how do y’all do it without any help? My husband works 12 hour shifts 6 days a week during the night. My baby went from sleeping through the night for a week to regressing back to every two hours. This morning I threw up everywhere because it was like my nervous system was so jarred from not getting any sleep longer than about an hour since is takes me a while to get back to sleep. I don’t have any family that is willing to help me for a night. My mom did once when I was really desperate. How do y’all do it? I love my sweet baby so much but I literally just need words of encouragement this is so hard I have never been so low.