Mommy, what is this period or what is it even? My daughter became unbe…

Mommy, what is this period or what is it even? My daughter became unbearable, she only comes home with me in her arms, nobody else needs her anymore, before she stayed with grandpa and grandma, now she screams at sunset She used to go to kindergarten normally without crying, but these two days are terrible, she runs after teachers like a puppy, when they hug her or carry her on their arms everything's fine, only when they leave she runs after them and screams I can't handle her, yesterday I left her with parents for an hour and she was screaming