I am 26 years old. I started going back to college in August. I am at school Monday through Friday. I also work 40+ hours a week, and volunteer every other weekend. Since starting classes again I have been having a lot of trouble with my knee. There is heat coming from it. It gets swollen, and red by the end of the day. At first it didn't hurt at all, it was just swollen. However; the last few weeks it has started to hurt, and I've gotten lightheaded a few times. Also there is this popping sound that happens if I rest it for awhile, then try to get up. My knee also itches to every now and then. I put ice on it every time I get a chance, and I switch it up with heat pad, but even when I get a chance to rest for a day it does not feel any better. Any ideas?