Calf cramp for 3 days, cut shin on stick just before start of cramp. doesn't look infected, just coincidence? how do i stop the cramp?

A Sticky situation.: Sometimes two events happening in close proximity can be coincidental, but then again they can appear to be a little too coincidental. Since you have never had the cramp before the shin incident, there could be link there. The fact that you have had the cramping for three days is troubling, in light of the shin injury. Because of the multiple reasons for calf cramping, you should be examined soon.