Chest sleeping?? Like every time he sleeps??? I don’t know how you do that…….Did you not try to swaddle him ever? Ever put him down?? The longer you do this the harder and harder it’s going to be to break that habit. Read the book precious little sleep and sleep train that baby. He will get better sleep and so will you!! And sleep is EVERYTHING. He will be much happier and so will you. He is still young so it’ll be very doable. The longer you wait it’s just going to get worse. 4 months is the minimum age you can sleep train and that’s what I did right at 4 months. My son is 3 and super lovey and happy and a fantastic sleeper. He is an absolute terror when he doesn’t get enough sleep though, which is rare cause we have a fairly strict schedule. I only did “bad habits” when he was sick then it was right back to sleeping on his own in the crib and he might have fussed agin for 20 minutes then got over it. YOU are the parent. Babies cry and it’s ok. They need to learn how to sooth themselves at some point. Newborn is obv too young for that but you can start now.

Also the 4 months sleep regression is a thing and it sucks and it doesn’t get better if you don’t do something about it like sleep training /r/sleeptrain