Is it unreasonable to feel like a zombie and be almost unable to function after 2 nights with no sleep at all. I’m a single mum. My 9 year old DD (she’s autistic) often goes 2 nights without sleeping at all which means I can’t sleep either! DD usually goes 2 nights (and she won’t sleep or nap in the day either) without sleeping and then sleeps really well on the 3rd night and then goes another 2 nights without sleeping and so on and on. After the 2 nights of no sleep I often feel like a zombie and can barely function with the sleep deprivation, I still have to work in the day as well whilst DD is at school. This has gone on for years and I’ve tried so many things to help get her in to a better sleep routine but nothing works. She’s also already on the highest possible melatonin dose as the paediatrician won’t give her a higher dose. The sleep deprivation and exhaustion is killing me! AIBU to feel like this?