If that's not verbal abuse, I don't know what is. Your mother needs help. You need to get out of there.
Will your uncle take you in and treat you decently? If so, then move in with him. Get a job, anything you can get for now, to start supporting yourself. You need to be away from your mother, immediately.
Now, is your life ruined? My word, no! Education usually is not wasted, and plenty of people change gears somewhere along the line. I have a degree totally unrelated to nursing that I don't "use" but don't regret. My husband has a degree he hasn't "used" and he is starting back to school now, at over twice your age, because the work he's been doing is no longer what he wishes to do. I've known any number of people who started off in one direction and went in another (including physicians who started out as nurses, respiratory therapists, dentists, and psychologists). Recently an educator at a community college told me that the concept of getting a bachelor's degree in four years is an outdated one, that most people don't graduate at 22 any more. Ruined your life? Doomed yourself to dead-end jobs? I don't think so!!
Get away from your mother, get a job, get someone to teach you how to drive, get over the notion that you aren't capable of doing whatever you really want to do.
If you really want to go into something like sonography, then by all means do so, but don't give up on nursing just out of fear. Give it a try; take a CNA class and try working in the hospital. Try getting a job in a hospital doing something like carrying trays for dietary, pushing patients around as a transporter, or working as a unit clerk. A job in a hospital might give you a much better idea what working as a nurse is really like; keep in mind that not all units nor all facilities are alike.
Good luck and let us know how you're doing.