Well I am back on my cilantro soup routine, it makes exactly that, the foggy head, tight feeling, achy ear go away.

Though I wasn't foggy headed all week, but a good day with it today, ate a bunch for lunch, ate some more a couple hours ago. No symptoms to report.

If it's not mercury, hey maybe it's lead or aluminum! Are you taking any medications, over the counter painkillers? I always suffer a bad head a few days after using asprin or otc painkillers/meds of any sort.