Painful setback

I've been having problems with my legs the last couple days. I did a bit more walking around/standing than usual and as a result, my leg muscles are knotted up and I"m in a lot of pain. I massage them as much as I can, but my arms are weak and in pain also, so it's not very effective. Stretching has helped some and allows me to walk when I need to, but still with great difficulty. It feels as though my muscles are bruised and any pressure at all is painful. I also feel a constant burning and heat radiating from them. I've never had a reaction this intense to so little movement before. I have to admit it's more than a bit discouraging, but I'm trying to keep my head focused on my recovery, and not my setbacks.