Well you've only got 6 months to go, so hang on in there. You must get away from your mother as soon as you can she is controlling and prying into your life in an unhealthy way. Might be best to tell her as little as possible, even lie if you have to, anything for a quiet life.

Psychiatric meds can work wonders and are not bad at all, if they suit you.
You will graduate and do well. Don't let her drag you down!