You don't need to quit. As I said before you can take medical leave and then come back. I looked up Australian universities ( 5 different ones) and all said you can take entire year off for medical reasons, all you need is a letter from your doctor ( pdoc or psychologist etc those that you are seeing now). The way you describe your current condition you will have no problem to get a letter from them. When you are better then you comeback

Sent from my iPhone using Tapatalk