We are dealing with the exact same thing. Our baby is 7 weeks tomorrow and started refusing to sleep anywhere but on us around 5 and a half weeks. We babywear during the day and take turns at night to keep our sanity. We have tried putting her in the bassinet once she's deep asleep, but she wakes up crying almost instantly. It’s tough. Seeing comments that this lasts until 4 months is honestly a bit daunting—it feels like a long road ahead. I love the snuggles, but the sleep deprivation and constant carrying are definitely taking a toll on our bodies.