Ky two weeks is a long time to be limping, did you see a doctor about it? Otherwise you could try to get one of those support bands joggers use to apply pressure on the knee, just to relax it a bit.
I can work really hard, if I
need to. Really really! Last two weeks of my internship I pretty much got up at 5am, got home at 7pm or later, ate, then worked until at least midnight. 3am, by the last day. Spent a lot of time during my weekends working too for the whole internship, and while I was studying (and was, naturally, best in class for my efforts)