kevin, did you see my post below? Maybe you've misedd it somehow, but it sounds like your pain may be caused by a compressed muscle or nerve.
Excerpt from 1st link:
"Piriformis syndrome may overlap with a variety of other problems including what McCrory et. al. have called a "deep buttock" syndrome. This includes pain in the buttock region, possibly pain in the hamstrings, occasionally pain in the back of the leg that is difficult to locate."
Excerpt from second link:
"Piriformis trigger points, by keeping the muscles tight and rock hard, can cause actual sciatic nerve compression. Pain from piriformis trigger points is harsher and more electric than pain from gluteus minimus trigger points and is felt in the back of the thigh, the calf, and the sole of the foot. There may also be other abnormal sensations, such as numbness, tingling, burning, or hypersensitivity, in any of these areas."
wish you well in your endeavors, and recuperation.