It sounds like I have the same problem as the OP. I have been dealing with this for a year now, and I have had every treatment under the sun on my calf and the numbness/cramping/nervy pain keeps coming back when I start up running (Also I was tested for compartment syndrome, but it was negative). Early April I decided to start hitting the gym and build up strength in my legs, and found that lunges, leg press, squares and hamstring curls (basically anything involving the hamstring) really gave my calf relief (but the problem of numbness/cramping/nervy pain ultimately would com back).
After reading about sciatic problems, I am convinced it articulates perfectly what I have been dealing with over this last year. So my question is, outside of the obvious "go to a Chiro or PT" (which I have spend too much money on already), what can I start doing today that will help?