Foot and ankle pain

I suffer from severe pain in my foot and ankle during exercise. Pain is around my ankle bone (inside), over the front of the foot (where the leg joins the foot), in my achilles (when I move foot up and down) and under the foot from heel to toe (when I move it up and down). Sometimes when I am walking the foot feels as though it is about to come away from my leg and it clicks quite a bit when I move it.