Why is Passive Smoke like Kryptonite to me?

Whenever I come across passive smoke - I get anxiety attacks. My whole mental perspective shifts causing me to stare into the abyss and go on an emotional roller coaster. To some extent I have engineered my life to avoid other people's smoke. I have even looked at places to live where it is banned. Whenever I walk down the high street it's like dodging bullets in Vietnam. This is all going on in my subsconscious.