Help what is going on??

My 3yo is severely sleep regressin!!! I used to tuck her in and she’d be up 7-7... now she goes to bed we say goodnight then comes out once I close the did door we do this for like 1.5hrs!! I put her back to bed we say gnt I close the door she’s out saying she wants to sleep in my bed😭 she’s always slept in her bed since 6mo!! This has been going on for like a month I’m losing all my hair.. lol She’s up at 5am!! And maybe naps about 1hr.. She’s doing the same with the food where she only wants milk says “yucky food” . I spoke to the pediatrician she’s like.. hopefully is just a phase!! Gee tx;)

Anybody bed in this situation? What did you do? She’s not lethargic or anything..

Thank you!