Knee Pain - clicking and crunching?

You may have damaged cartilage in your kneecap. I have this too, and it can affect your hips, your muscles and even give you very flat and painful arches in your feet. Go and see a doctor and see what he says. You may be referred to a Chiropractor and/or physiotherapist. In the meantime, do gentle muscle stretches everyday and avoid working out. Wear soft, comfy and shock absorbing shoes (Crocs are ideal, but they are very flat so I have to wear specialist arch orthotics to avoid pain, it might help you!) and if you go swimming, which helps, but do NOT do troke. It canes! :)