It difficult to give you a diagnosis based on the information you have provided. There are many different causes of knee pain
and a physician usually makes a diagnosis based on the site, character, intensity, timing, duration of the pain as well as associated features such as clicking, locking, swelling and giving way in the knee joint. The physical examination often helps to pinpoint the problem and then X-rays and or an MRI
or CT scan
can help make the diagnosis. I would encourage you to go to your family Dr so he can assess your knees.