Baby waking up frequently

Hi friends. My baby girl is 7 months old. I got her into a sleep routine and she usually feeds and sleeps by 8-8.30 pm daily. She sleeps in her crib in nursery. Since 2 days after feeding when she is almost sleepy, after I put her in the crib she is immediately waking up and crying. Again if I lift her and hold her she is calming down n sleeping. When she is in my arms she is sleeping well. Again when I put her down in crib slowly she wakes up and starts crying. This is continuing most of the night. I am just so tired since 2 days. I want her to continue sleeping in her crib. I don't know why suddenly she is not sleeping properly in her crib. I checked room temperature, her health and everything is fine.

Any tricks or suggestions to address this situation?

Thanks.