Separation anxiety?

My 9 m/o’s separation anxiety is getting worse. Sent her to school since she was 4 month old and she has been doing okay but recently ever since almost a month ago, she starts to cry whenever drop off time - but she doesnt when her favourite teacher carries her in school. She also doesnt want strangers or even my in laws and she wants to cling to me.. please tell me if she’s gnna outgrow this or it’s gnna get worse…