I had a friend get shingles after stupidly messing around with Xtasy, the drug.
Come to find out, that since Shingles lives in your spinal column, and drugs like Xtasy and acid have a huge impact and effect on your nervous system/spinal column, they can release things stored there. A bunch of ppl I know who have done Acid or X (never tried either myself) all complain about a stiff neck/back, back pain and tension, which from what another friend told me is the body reacting to the strichnine used to cut the drug (gee, and why is that I never played with hard drugs?

).
He took too much, and it was released from his spine into this body. It spread over his head entirely, they had to cover his eyes with shot glasses. Eventually it went away, but he was out of commision for quite some time.
Sucks Wolf, hope you get better quickly, not fair to have to deal with somthing like that without a good reason or an obvious fuckup.
Steve