I get pain in my left knee when jumping hard.

[sashag87]

I get a sharp pain in my left knee when jumping hard. I can run and sprint without pain. I can even jump 10 to 12 inches without noticing any pain. But when I do a two legged jump to go up for a dunk, I immediately get pain around the middle of my left knee. It then hurts to jump and there is pain when doing even a minor squat. Eventually within about an hour. I can do a squat and feel a only a minor discomfort in the knee, after a few more hours it eventually dissipates to no pain and just a feeling that something isn't right when I squat. The next day I can go out for a run and feel no pain.But if I try to jump high, the pain comes back. I had x-rays and the Doctor told me everything looked normal and it was probably inflamation and told me to rest. This started about 8 months ago. I was squatting down on my heels playing with my kids. I was in that position for about 5 to 10 minutes. When I stood up I felt a slight pain. And since then I get pain when I jump. Do you think this is fixable, should I get an MRI? Thanks for any help.