3 months old infant can't sleep well.

Maybe try to let her cosleep with you instead? I remember around 3mo, my baby likes to sleep on me instead of the bed. Once put on the bed she will cry until I put her back on me. Almost broke my back and neck during that period by trying not to move 😅 But it only lasted for a while till she don’t want to be carried anymore 🥲

Could be 3rd month growth spurt? Sleeping not much and wants to cuddled often