Acupuncture gone wrong?

I had acupuncture for my sciatica and piriformis. It was the third time I had the needles and they were connected to something like a TENS machine. I left the office and complained about my foot feeling funny. After about a week, I couldn't walk. Nerve pain was keeping me up at night, and it was severe. Went to an actual MD, who is now trying to get an MRI, said at least two nerves are involved. Could it be possible that acupuncture screwed up a nerve or two? They were disposable LONG needles. The pain is in the foot, leg. . . now stuck on amiltryptiline (sp), and pain killers.