Hoping for some answers or solidarity as I am so sleep deprived and at my wits end. So much so this is my first mumsnet post. DS (first baby) is 18 weeks and the 4 month sleep regression hit at 16 weeks. He now is only sleeping for 45 minutes at a time and is needing to be BF back to sleep each time. Everytime I'm about to fall asleep, he wakes and it is killing me. Before this he was sleeping for 3-5hrs at a time each night, just waking for a breastfeed and nappy change. He is combi fed and has a formula bottle at lunch time and at tea time but other than that is BF. I have always BF him to sleep and he has always only contact napped. He has reflux and is on gaviscon which has massively helped. DH is really trying to help, taking over at 3am so I can get 3 hours sleep in before he has to leave for work, splitting sleep shifts over the weekends etc but it's not sustainable as DH works away a lot and when he's away I'm on my own. We are desperately trying everything we can to get DS to go into his next2me 'drowsy but awake' but he just screams and is inconsolable until he's back on the boob. I've seen such conflicting information online. All the BF support groups say self soothing is developmental and will come with time, all the sleep coaches say it needs formal sleep training. I cannot bear for him to cry himself to sleep so CIO etc is not an option. He has slept the odd 2-3 hour stint since the regression hit so I know he can do it but its mostly every 45 minutes and then it's taking me at least half an hour to get him back down without him waking and the process starting again! Would love to hear peoples experience!