I used go cry sitting in a doctors office. I never knew why. They thought I was just overwhelmed from being sick. One ID doc told me I was bi-polar
A few years later I mentioned that to a doc that specialized in Environmental medicine and that I felt like was going to have a nervous breakdown in grocery stores. Immediately he said MCS and then it all made sense.
Cleaning products and pesticides did me in. I will say after DMPS chelation I no longer have the problem.
You'd think that medical doctors would know that the nose gave access to the brain, and therefore that nasally-inhaled substances could enter the brain and have effects there. After all, some anaesthetics are administered this way.
At my previous doctor's surgery/office I often became dizzy as soon as I entered the waiting room. It smelt weird in there. I almost fainted at least once.
I have also had the 'instant depression' effect - in my own home. A smell seemed to be coming in through the wall from next door. I was just sitting reading, when suddenly I was in deep depression, sobbing uncontrollably. Then the smell disappeared and my mood was instantly back to normal. I was left with tear-soaked cheeks, almost in shock, wondering what in earth had happened.
Neighbours' laundry perfumes are the bane of my life where I live. I have to wear a nose clip and breathe through my mouth in my own garden, when I want to smell the natural smells.
In an isolation room in hospital I was almost being driven crazy by multiple different bleeping noises that kept stopping and starting. I tried putting a pillow (lightly!) over my head to muffle the noise, but couldn't because it stank of perfume. The stress was enormous - it was like torture. I almost discharged myself from the hospital in desperation.
EDIT - just corrected a word - I have to breathe through my MOUTH in my garden!