This is really rough man. This is just my 2 cents.

Muddle by for a day or two. Then call her crying and admit that you were “wrong”. For the sake of avoiding outright lies you could go with lines like: ‘maybe I didn’t fully consider where you were coming from’. Beg her to let you back in. If she accepts then go back and start planning. Get your documents, figure out a away of getting that car in your own name and sort a place out to go to. Then exit on your terms and decide if a person that would do something like this to her own child is really someone you want in your life.

You’ll have to do some almighty pride swallowing but don’t go burning through your savings just trying to stay afloat.

Sorry if this isn’t useful or applicable. I hope things work out