Here is my advice. When someone tells you who they are believe them. Get out. DO NOT contact police or any kind of law enforcement until you are gone and safe. People like this will escalate if they feel threatened.
You can get new documents, clothes and items. Even if you only escape with the clothes on your back, wallet and phone. Make sure your family cannot track your phone. Make sure any communication you have with your helpers is locked down. Use an app your family doesn't use or understand, like Snapchat or Discord. Have your helpers or uber pick you up a few houses down in the middle of the night if you have to.
You would be surpised who still cares for you. Reach out to family, to old friends, to anyone you think could help, either by giving you a ride or taking you in for awhile. I haven't talked to my best friend from collage for over a decade, but if she called me needing help I would drop everything and head her way.
Also, I live east coast and hell, maybe I could give you a ride to somewhere depending on where you are going.
Lastly, please take this seriously. You are not overreacting. Your life may very well be in danger, and just like with any other abusive relationship, leaving is the most dangerous part. Nothing you own outside of your ID and medications are worth dying for.
Not just under 30. My husband is disabled and if ACA or VA benefits get cut he will die. Horribly but slowly, in our house where I will have to take care of him until the end. And pray we still have enough of a functioning society to bury him when the time comes. How I am supposed to feel anything other than horror and dread for the future!?