can I be fired for being bipolar? my boss harassment is unbearable and has sent papers to the college of nurses accusing me of drug use (not true) what do I do?

No, you cannot be fired for a medical condition. If you are part of a union, then you should speak with the union asap, since only the union would be allowed to help you. If you are not part of a union, you need to give me a call so that we can discuss this in more detail.
Lior Samfiru