Did smokers do this to me?

Question

Ever since i went to the clinic for my physical, everyone i had gone in contact with were smoking, even the doctors.

the next day, my chest started hurting and i had a lot of phlem.

Answer 1

Probably.  Second hand smoke, in large amounts can irritate your lungs and cause you to produce extra mucus, which you then have to cough up while your lungs are cleaning themselves out.

Answer 2

I'm pretty sure it takes more exposure to smoke than that to have an effect on you.  Although, you could be allergic to it, in which case you probably would have an immediate reaction to it.

Your condition should get better soon.