How screwed am I?

You can always try! No harm what so ever. Do you have your families support? Do you have an idea of any schools you’d be interested in attending? I agree with the person who stated you should get an evaluation. Also see when next summer’s college programs begin to take applications. You’ll need prescreens for many of them. I believe most applications are due by January. What part of the country are you from? Can you get to NYC? Broadway DAnce has classes for pure beginners. What you might do in forgo an MT major and get a BA in theater from a non audition school and then get your graduate degree in MT.