I am what they refer to as "A Canary" , like the olden days when Miners would send down a Canary into the mines to check for gas and other hazards, if the Canary passed out or worse died, the miners knew not to go into the mine that day as it had too much gas.

Multiple Chemical Sensitivities is also known as the Invisible Illness, for years, Doctors, Scientist and other's thought it was a mental problem, aka all in their heads, but soon as more and more people's immune systems were compromised by being sealed up in Houses and office buildings outgassing deadly chemicals like Formaldehye, and other manufacturing chemicals, the Medical Community as well as OSHA and Government agencies in the US took notice.

I can honestly tell you this is not in a persons head, it is a real and complex problem and many people suffer in silence with it.