I saw your post on flagyl. Sorry to hear it ramped up symptoms so much. Did you end up taking the gabapentin?
In regards to flagyl, I remember reading this doctor's article a while back. They talk about
some patients that have a strong sensitivity to treatment, and their strategy was basically to give them super tiny pulse doses and build up from there. They specifically talk about
flagyl as well: http://francisholisticmedicalcenter.com/images/managing_through_the_herxheimer_reaction.pdf
I hope your symptoms can get back to baseline soon. According to the above article the doctor says with things like flagyl it can take a while for patients to restabilize in regards to herx with these meds.
Have you ever tried quercetin? I think that one helps some people.
You are taking quite a few antihistamines correct?