After walking for four days in July at Universal Studios & Disney World, I started experiencing pain in my right knee. I am 53 years old and have tried 800 mg Motrin 3 x a day for 10 days straight, ice, compression, rest, etc. Now a couple months later, it is still warm to the touch, some swelling, can t bend my leg straight when standing up, pain, and sometimes gives out. What do you think it is? Should I go to a regular physician or to an ortho dr?