Well, I had head symptoms big-time, that's for sure!
Good thing? Bad thing?
Either way, I daren't take any more for now. Got a mega-crop of cold sores that started a few days ago and wondering if that's a knock-on effect.
Sorry, I intended to say more, but I had to take my boys to school.
I think this is a good thing, provided this explains what happened in your situation. Are you sure they were sinus headaches?
There are number of distinct, recurrent headaches I have experienced over the years. One of the worst and most persistent is the variety wherein the superior orbital rim is also exquisitely tender (across the inferior aspect of the frontal bone/eye brow). There is also a headache that is more central, over the frontal bone. The former, I believe, is associated with H2S, as this variety is amplified by intake of most sulfur compounds. The latter is generally more mild, and I believe is associated with LPS. This type, however, can be combined with flu-like or cytokine symptoms. When LPS is administered to humans in minute quantities, such symptoms are prominently observed.
Of course H2S and LPS simultaneously occur, and with evidence that H2S dampens the immune response precipitated by LPS, I suspect this inhibited inflammatory response represents an evolutionary adaptation. In my opinion the severe headaches are generally produced by circulating toxins, this has occurred very often with liver detoxification efforts. In the context of displacing bacterial pathogens, I think gaseous hydrogen sulfide that accumulates in the blood after sulfur/sulfate reducing bacteria cell walls are breached and/or lipopolysaccharide may account for some headaches, but I'm just speculating.
Your headaches might be related to something different. From my early experiences with immunomodulating agents, I experienced some unusual head pain, which I would argue was not caused by circulating toxins, but produced by the immunostimulatory effects acting upon pathogens in the head and neck, where the vascular supply and immune response is very brisk. This, I think could be described as a sinus headache, but I seem to recall pain throughout the head in places where sinus cavities do not exist. For me though, I think these were generally accompanied by lymphatic soreness in the head and neck, although I don't recall for sure.
The cold sores are clearly a sign of enhanced immunocompetency. I think I first started experiencing these about three years ago, and they would episodically re-occur for about two years. I had never had a cold sore, until this time. In the past year, this has been replaced by apthous stomatitis, which is more of a T-cell phenomenon. I welcome these, because they seemingly represent steps in the restoration of an appropriate and effective immune response.
You may want to palpate your lymph nodes, particularly the occipital, cervical and submandibular nodes to see if you have any soreness there.