Should i self isolate until i get covid 19 test? i'm experiencing flu like symptoms and live in melbourne?

Yes, you should immediately self isolate & get a COVID-19 test. When you get tested discuss when vaccination would be good for you if you are not already vaccinated. You may have COVID-19, flu or some other infectious illness which should be treated with isolation & supportive care as soon as possible. I wish you well with your health!

Definitely, specifically if you have been potentially exposed. Follow local public regulations and inform your primary care doc so that he or she can further coordinate locally.