Good evening, I'm a male of 23 years. About two months ago, I started experiencing a little pain in my knee joint but it was negligible. Then, 3 weeks ago, the pain increased and right now, it's now affecting my calf region and sometimes my ankle. I can't stand for up to a minute because of the pain, I'm mostly lying down. I've used pain relievers including ibuprofen all to no avail. What could be wrong ?