I'm not finding much about the shingles vax and false positives on the hsv2.
I do know that false positives can happen for lots of reasons - the most common being that the test picks up on normal blood proteins.
The higher the index value, though, the lower the chance of it being a false positive. I *think* the highest Terri Warren has seen is 17. (Don't quote me on that - it might be wrong.)
Get the WB. I don't want to give you false hope, but anything is possible. It's also possible that you've had hsv2 this whole time and didn't know it.
I know no one wants herpes, but if you've had it this whole time, nothing should really change for you and your wife, practically speaking.
I can tell this is kind of eating you up. Don't let it. Get the testing done, but don't let this change you if it is positive, okay?
How's your wife feeling about all this?