OMG Natalie, how awful.

So you and Neuro think that TY may be the culprit here, huh? That stinks, since TY is otherwise helping you.
I've never heard of this recurring Shingles. I'm going to go read up on it. If you stop the Ty for awhile and take an antiviral, will the shingles eventially subside?
You are in my prayers. I hope you heal soon.