I have 4 kids all 20-23 months apart. None of them were good sleepers as babies but over time they became decent sleepers accept #4. He turns 3 soon and the poor kid has honestly never slept through a full night. Thankfully he's now going 4 and sometimes 5 hour stretches between outbursts, screaming, moaning etc... But many nights he wakes up every hour or two and cries for us thus not allowing us to get sleep.

I went 4-7 years of having 1, maybe 2 nights of uninterrupted sleep. Sleep deprivation reeked havoc on my body and my mind, it's been miserable. I've dedicated a lot of time to learn ways to overcome and cope with these issues born of having sleepless kids but honestly it's all be worth it.

You need to find ways to take care of yourself without burdening your wife too much or taking away from the kids but keep your head up and fight through it.