I need answers.... QUICK!!!?

ok so i go back to the Dr for a followup on my knee on tuesday. This will be eactly 3 months post injury, and for the most part my knee finally feels "normal" i mean the pain is minimal(unless i stress the knee) and the swelling has all but gone away(unless i am on it for a bit of time). So the other day while i'm doing my ROM exercises i go just to the point of discomfort (130 degrees) and i hold it there for afew seconds and then i try and pull it just a little further, well when i do i get a pain along my joint line where the injury is(MCL) but the pain seems to be deeper in the joint and is like a stabbing sensation. Then when i go to straighten my leg out the pain continues until i get to about 85-90 degrees and my knee seems to "catch" and then after that point the pain becomes more to syrface of the joint and a bit more intense. Also, i have been noticing creaking and clicking in my right knee(not injured). Should i mention these things to my doc and what could they mean?