Knee injury

I have injured my L knee playing tennis. I landed badly and since then have medial joint pain, which occurs when my leg is straight (both WB/NWB) or when I squat. No obvious swelling is present but after activity the knee is very sore. I have had realignment surgeries before (both arthroscopy and arthrotomy/Fulkerson) and thus worried. I see my OS in 2 weeks, though I am curious about what the outcome of my visit might be. Let me know if U know what might be wrong. The injury was 4 weeks ago.Thnx