All of the sudden? Not really looking for advice but wanting to see if this is just happening to us.. my son has been sleeping thru the night since after Christmas, but the last week or so he has been refusing sleep at all costs. Can’t get him to sleep until 10-11, only taking like an hour nap during the day (when he usually takes a good 2-3 hour nap.) he’s also been waking at 4am EVERY DAY. Then can’t get him back to sleep until 6am..I’ve read there’s a 18 month sleep regression but I never know if those are accurate or not. I feel like I have a newborn all over again.