I'm going to yell at my aunt for telling my family I was in therapy
Why would you want to yell at your aunt?
She told everyone and never has supported me.
It is rude to isolate others for their mental health problems. She should not have told people but you should also not yell at her for doing so.
She deserved it.
Your aunt made a mistake and shouldn't have betrayed you like that. Calm down a bit and wait a couple of days before you approach her again. You will be more level headed and she will be more likely to listen to you if you sound reasonable.