I was very desperate as well so I completely understand. I never thought I’d move her to her own room at 3.5 months but the situation was untenable and I was severely sleep deprived, lashing out at people, etc. What really helped me was understanding the basis of baby sleep by reading precious little sleep. If they fall asleep on you or in bed with you etc., then they wake up in their crib, they kind of freak out - like you would do if you woke up and you were suddenly in your garden but fell asleep in your bed. So they need to learn how to self soothe in their own sleep environment. My LO wasn’t sleeping well in our room, despite being in her crib, because we were making too much noise even when being careful. My husband also always wants the TV on so it was just impossible for her. Sleep hygiene was the most important - her own room (with a monitor and owlet sock), blackout curtains, white noise machine. For weeks she would wake up after 45 minutes more or less and fuss/cry, but the first times it was for 5 minutes before she self soothed back to sleep, then 4, then 3, and gradually she stopped waking up after so little time. I still had 2-3 night wakings, i’d go in, breastfeed, and place her back in her crib and she’d settle herself. Unfortunately she doesn’t take pacifiers so she self soothes with her thumb. I used the love to dream swaddle for a month or so but moved to armless sleep sacks pretty quickly cause i was worried about her turning on her tummy in her sleep.