DS (7 months) makes the exact same sound as the children from the Grudge (deep, slow croaking) all through the night. I'm pretty sure it's happening during REM sleep, and will often result in crying if he's not resettled as it seems to begin waking him up. It is driving me to the point of despair because it's way too loud to sleep through so I haven't had more than 2 hours sleep since he was a newborn (and even then the maximum I got was 3), it's meant DP and I sleep separately which is putting massive strain on our relationship, and I've occasionally made DS cry because I've very abruptly said his name when he's been making the noise in the night and it's startled him awake and obviously left him scared. I'm honestly not going to be able to go back to work at this rate (I do 12+ hour shifts) because I'm so exhausted all the time, but I can't afford not to get paid. It's just so depressing.