I had so many problems with herxes early on. I had to go really really slowly, was able to build up over time, but sometimes it took a really long time! Anything that gets to intolerable, ER level herxing is way too much imo. Whenever you feel at the end of your rope you should pull back.
Whenever I had a major herx crisis I would stop the antimicrobials. Sometimes it would take up to a week-10 days to stabilize. So usually I'd wait to stabilize before I reintroduced meds (at a lower dose).
I've probably shared this with you before, but it has always been super helpful in reminding me that we each have to go at our own pace with treatment: http://francisholisticmedicalcenter.com/images/managing_through_the_herxheimer_reaction.pdf