due to a medical condition, under orders of a doctor, my availability went from full time, to 3 shifts a week.
I informed my workplace, and they have stopped scheduling me completely.
I have worked there for 7 months.
I am a full time student recently diagnosed with anxiety and depression.

Thank you for your question. From what you have described this would be considered a constructive dismissal and you are owed severance. In addition, you may be entitled to Human Rights damages. I would encourage you to visit the severance pay calculator our firm has developed to see what you are owed (www.SeverancePayCalculator.com). I would also encourage you to call us and set up a consultation with one of our employment lawyers to discuss your matter further.