Bum knee

I am at home in bed with a bum knee. It's been bothering me ever since my birthday (for about a week) and has gotten progressively worse. It's now at the point where it hurts to put any weight on it, and even bending it is problematic. Sitting is hard, getting up is hard, showering is hard, and walking is even harder. It almost feels like the pain I had with Rheumatic fever, however that was in both knees, and it got to the point that I couldn't get up without help.

The knee is a bit swollen, however I don't think I have Rheumatic fever again. At least I hope I don't! I have a Dr's apt this afternoon, so we'll see what they say. It's pretty sad that I got a bum knee for my birthday. Hopefully they'll figure out what's wrong.

--Update--4:00 PM
The Dr says I have bursitis. I feel so old!