Injury Report: Torn Meniscus or Runner's Knee?

So I was tied up a little while back with a knee issue. I had been running a lot! And I really do mean a lot! I was in a running competition with co-workers and my natural competitiveness didn't help me here; it only hurt me. I put it off hoping it would get better on its own. Well that just didn't happen. The final straw was a 5k on the beach that completely left my left leg in pain to where I could barely bend it. So I finally decided it was time to see the doctor. I was afraid he would tell me I need to stop working out; and that terrified me more than anything!