Ok...so I've had poor cognition for as long as I can remember. I was very brain fogged and just generally "didin't get it" as well as had some fatigue as a child and I still am, although I can pass as normal for short periods. I feel kind of autistic, but it's more than that...and it all got worse around when my period started. I also had what seemed like a flu virus a couple months before starting menstruation (and that's the last time I've actually been sick in almost 11 years, which I think is abnormal). But I've always wondered if that flu could have had something to do with my condition worsening. Also, which brings me to MCS and histamine, I used to have terrible allergies during childhood that hit out of the blue at 4-5 years old and although we're diagnosed as seasonal, I actually had them year round...and we had no pets or anything. And the allergies decreased a lot around the time I got more fatigued, to the point that I no longer have to use an antihistamine to make sure I'm not coughing up mucus. And I stopped getting sick. I know those last two things are probably blessings in disguise given all of the other stuff I have to deal with, but I can't help but worry that my primary immune response has been turned down or something. I know most of you don't work in the medical field, but I have a doctors appointment coming up and am trying to figure out what to do to prepare for it. Does this sound like it could be caused by chemical intolerance, or a histamine dysregulation? I have no idea how to rule out chemical sensitivity other than maybe try wearing one of those carbon filter masks and try and avoid stuff. I already avoid foods like gluten and dairy. But I'm pretty desperate because my cognitive symptoms remind me of people in my family who've been diagnosed with serious illnesses like multiple sclerosis and dementia. I'm going to try it and see, even though I'll feel like such a weirdo but who knows maybe it will give me a clue.