Scared to be put down

Hey moms , my LO will be 2 soon and is still afraid of being put down to walk . As soon as I put her down she screams and cries . I can’t go anywhere in public without her screaming and crying because she doesn’t want to be put down . I am so tired and worn out ,. What am I doing wrong ? She won’t even play with other kids , even when she was around kids at daycare . I take her outside to play with her ball and go for walks and all she does is cry the whole entire time . I’m starting to get concerned