Pain on lateral, posterior region of the knee... MD didn't care.?

I'm looking randomly for any clues on what to research and confront my stupid general practitioner with.

For several months now, the outside area around my near has been hurting. Over the past 3 weeks, it's gotten to the point where it will flare up to near excruciating. I went to my doctor, and he focused on the fact that I will sometimes get twinges on the front of my knee. He decided I have a patellar misallignment. After asking how that would relate to my major source of pain, he said that it didn't really... but that my only problem was the patella! *stab*

So, I did the dumb exercises and now while I don't get anymore twinges, the back of my knee is hurting worse than ever. No matter what position is it in, whether I'm laying down or standing up, it's sore and then flares to agony. The joint feels stiff all around now, and it's sometimes hard to extend or flex the leg.