i fractured my knee about 6 years ago by letting go of a sno tube while in the air and landing on my right knee which forced my femur into my hip which caused my right leg to be an inch and a half shorter than my left leg. an mri was done and they put my on crutches until the pain went away. a year later i began intense running for a sports team and began having knee pain, i went back to my orthopedic doctor and he told me that my knee caps had grown crooked and he sent me for 6 weeks of physical therapy. at the end of the 6 weeks i was still having knee pain but they did not know anything else that could help. the pain slowly went away and my knee only tended to hurt when i had my leg bent for long periods of time. now, a few weeks ago i began a Zumba exercise class and last week when i was bending my knees in the class i could feel alot of cracking and grinding. ever since my knee seems to hurt more and more every day and the pain seems to be on the inside and upper part of under my knee cap, it seems that the pian only subsides after laying in bed for a little while at night. any clue on what could be wrong? i have an appointment to see my orthopedic doctor but he can not see me for another month.