This HAS to be the 4 month sleep regression. It HAS to be. I'm losing it though. She doesn't just go to sleep and wake up every few hours. She DOES NOT SLEEP. DOESNT SLEEP. it's 2am, hasn't been to bed. She is SCREAMING, like I am killing her might I add. Nothing helps. Nothing gets her to go to sleep. She is usually up until 3-4am. We are even struggling to get her to nap during the day. Lucky if we get one nap in. This is going on week 3 and I don't know what to do. I'm losing it. I can't run on 2 hours of sleep every day. And her screaming. It's SO high pitched and So so soooo loud I'm very surprised my neihbors haven't called the cops. She won't take a pacifier. And when I try to nurse, rock,bounce, pat or swing she screams. If I try to let her get herself to sleep, she screams. She will LITERALLY kick herself to wake herself up and then scream. This is kiddo #2 and our first had health issues and kind of ALWAYS screamed. But not this one, she was a good happy baby up until 3 weeks ago. HELP!!!