Hi Stacey ...
Sorry I didn't get back to you but I thought they advised you on this site when you had new mail and was waiting for that. Over the anti-allergy drugs like Piriton, I think it's back to the drawing board - at least for me anyway! Although my own symptoms certainly seem to have lessened with this treatment, it certainly doesn't cure it. I don't know if this is my imagination as well, but, having tried an anti-inflammatory ibuprofen-type drug (specifically Advil) seems now to have a better result.
Am also starting to explore the various thoughts on related pain - i.e.trigger points elsewhere in the neck and upper back. For instance finger massage on the back of the neck definitely helps. Will let you know!