Did your baby ONLY want to sleep in people's arms/ car seat etc.? How many months did this problem last?

Did you do anything to solve the problem? Our baby only sleeps in arms we are looking for people to share their experience. How old was your little one when they finally willling to sleep in a crib? FYI we tried swaddle, white noise, mom's smell, etc..... nothing works and she would detect it in 20 mins or so and wake up. Would not cosleep, won't take car seat,swing, bouncer etc either. We are new parents and wonder if it will get easier for her or not. She is 3 months old.