My 2 cents....

Here´s hoping some expert will come up with the "right" answers. However, IF it is in fact sciatic-pain - there are a few videos on YouTube that may help providing some relief.
1) Sciatica exercises from Loosethebackpain.com (healthy back TV)
2) Piriformis Stretch for Back Pain and Sciatica from Posturedoc and
3) How to fix Piriformis Syndrom from texafornia1.

Wishing you good (back) health! Tweet