It does say you are in Austria at the moment, not Australia....
In which country are you based at the moment?
Knee pain can be caused by many different problems. You need to go to a specialized therapist.
Finding one is not always easy, I would ask around, at sportsclubs, your GP and others to find the right person.
They should assess you both actively and passively and check your total lowerlimb function.
The only one that can really help you get to the bottom of what you have AND more importantly, how to recover again, is the health professional that is treating you.
Not people on an online forum like here.

Esther