When I say can't function I mean I'm tearful all day, very irritable with my other child and everyone else around me, not safe to drive. My 4 month old has never slept more than 3 hours in a row since he was born - and that's 3 hours on an exceptionally good night, I can't remember the last time he did it. On a normal night he's up every single hour.
It doesnt matter what we do - formula, breast milk, co sleeping, more naps, fewer naps, bedtime routine, white noise, dummy - believe me I have tried literally everything short of proper sleep training as he is too young. We co sleep simply out of necessity but he still wakes every hour. He's not in pain or screaming - just wants to feed for 5 minutes then go back to sleep. He does not have reflux or CMPA or any other physical issue. He is not teething. He is a content and happy baby but I am not. I am so chronically sleep deprived I can hardly remember my own name. I am not expecting him to sleep through the night. But 8-10 wake ups per night is just not sustainable. My DH works with heavy machinery so cannot take over the nights as wouldn't be safe. I have 0 family support and I mean 0. I can't nap in the day as I have to care for my older child.
I don't know what to do any more. I feel I can't go on.