Pain and Fatigue

My body is finally beginning to succumb to fatigue. I feel as if my legs are going to fall off. My knee started to hurt constantly today. I can't even sit without feeling irritation. My legs are just constantly tired. This isn't a problem that I have had before, but I suspect it has something to do with my sleeping schedule. I haven't been sleeping great for two weeks now, and I think it is finally beginning to take its toll. I just need to get back on track and hopefully all will fall in place.