Compensatory strain in the non-injured knee?

So I injured my left knee 3 months ago at the gym and the MRI revealed that I have a medial meniscus tear (grade 2). My doctor suggested physio and some rest. If it doesn't work out, then I have to consider surgery. The progress has been back and forth, but I'm feeling okay now.

But for the past two days, I've been feeling discomfort in my right knee - there's no actual pain or swelling like I had in my left knee, no knocking sound, nothing. Idk how to describe the feeling. I looked it up online and found that it could be "compensatory strain" because I'm putting too much pressure on my right knee. I didn't do any activity that could potentially lead to an injury. I haven't done any exercise for the past 3 months, just 20-30 minutes of walking, that's it. This is freaking me out :/

Has anyone experienced this?