IM DESPERATE PLS HELP ME

My 6 month old wakes constantly through out the night, every two god damn hours. It is ruining our relationship and my fucking sanity I don't know what to do he was doing fine until he turned 4 months and went back to a newborn schedule. We even turned to cosleeping but he consistently is up every two hours no matter what. Even if I time his naps right during the day.

It doesn't help that I have insomnia.

When he wakes up he'll happily drink, and keep down, 4 oz every single time. And stay awake thinking its play time and will start to babble and if we're not paying attention he'll roll from me to my partner seeing who is awake.

I'm losing my mind, what can I do?