Brooke, I'm assuming that you're not in England - maybe India? China? But the answer to this is important for you, as it sounds to me as if your age indicates that you are legally an independent adult. Check this with legislation in the country you live in.
As an adult you are free and entitled to make all your own decisions (and mistakes!). So maybe you now need to take stock, work out what you'd like to be / do, and work out how to get there under your own steam. It might be that while you are taking the time to make this decision, you take on some paid work. Given that you're online, maybe data entry or something like that. The cash will give you a bit of freedom and the work will take your mind of Mother Dearest.
If you are seriously concerned that your mother will try to harm you, you need to take steps to protect yourself. Now as I don't know anything about your situation I can't advise further on what you need to do, but it might include for example speaking to a policewoman, and / or working out how to lock yourself in your own room - a chair wedged under the door handle is a good makeshift 'lock'.
You may still be allowing yourself to excuse your mother due to cultural issues. This is something you need to let go of. Her behaviour is awful, manic and cruel. While she may have ambitions for you, she can't expect you to work in a profession you don't understand. One day she may accept this, and change, but I wouldn't hold your breath.
The whole world over you will find that some parents believe they have the right to dominate and manipulate their adult children.
On a practical note, you'll feel better from the gallbadder trouble by avoiding all fatty, oily or rich food. Don't allow anyone to give you medicine or concoctions if you don't know what's in them and what they're intended to do.
IMO your English is excellent and maybe using your language skills will be something you consider when looking for work.