The earliest I recall is 3rd grade after I received Hep B "protection" (I'll leave out the actual word in case this site doesn't want it here). Spaciness, unable to focus, grades slipping. After some months the issue reduced but I do remember my nose would still burn any time I went down the detergent aisle at the grocery store.
Around the age of 15 my little brother started to have rashes. Mom changed our laundry detergent and other products based on the tests the allergist did. I thought nothing of it at the time but that's the year I went from a C student to an A/B student.
No surprise I adopted the same products that mom used simply out of familiarity. Unknowingly this was created a lower issue at home than other places. If I went to a place where people might be, like a YMCA, it was horrible even if people weren't there. And the more people there were the worse it was. I went to dozens of doctors but nothing was found. The last person they send you to is a neurologist and he told me all he could really offer me was a certain pill. I said I'll think about it and went home to research. The pill was for anxiety. This resulted in about 15 years of defaulting to the idea that I must have some sort of anxiety disorder.
Around the end of that 15 year period I typed all my symptoms into Google and it returned a box at the top of the screen containing the definition of mercury poisoning. This kicked off years of trial and error with green smoothies and other natural health techniques trying to detox my system. One such experience, involving cilantro, was beyond belief. I became athletic and calm and my voice deepened. But it only worked for a few months and then I got worse.
Around that time I started to notice that when I got in my vehicle I felt very ill, to ill to drive. At that time I just thought it must be VOCs (which maybe it was). 10 years later and it would reach a point where I thought there must be a sewer leak or something. It had become so bad. I had my landlord over three times, plumbers twice.
Eventually I was laid off from a job. For years I had thought about the past when I worked labor jobs and had felt much better than I did in office work. I thought I just hated office politics. But here I was with nothing to lose by trying labor jobs again. Those first two days at work were the best I'd felt in a decade. I returned home now realizing what the problem was and proceeded to remove countless items form the basement, bathroom, etc. I had already been removing some things but it was never ending and I hadn't been sure if the products were even the problem or if I was just reacting to something else and noticing these things because they had a scent. But the job experience cleared that up.
Unfortunately I'm living with someone who doesn't try, and brings a few new afflicting things in each week. But I can say I have a plan. I'm keeping the fragrance-free job. I have my food delivered. And I'll get my own house and make it fragrance and VOC free. Once I have the clear head that will provide, I will figure out how to cure this.
I believe the cause is an overloaded liver. I want to try liver cleanses, though I'm going to take it slow due to no longer having a gallbladder. I also want to get back to cleaning up mercury, but this time I'm going to use an extremely low-toxicity antioxidant. Cilantro was surprisingly dangerous as are all the other mercury removal methods I've found, except BDTH2.