My baby is four days old, and I feel like everything I knew about newborns is completely gone out of my head.

Not only can I not get baby to sleep for any length of time at night in his own space, I can barely comfort him without breastfeeding.

I've gone three nights without any sleep, and have gotten maybe four hours over those days thanks to my fiancé watching him and our older child in between feedings. I feel like I'm going crazy, and I consistently start nodding off during overnight feeds, which I feel is dangerous.

Please give me all of your best tips and tricks to get him sleeping in his own space; even 20 minutes at a time would be a blessing. Please do not suggest sharing sleep space, I will not do anything that could even remotely risk his safety.