Allergic to Cigarette Smoke - Anyone Else?

I don't smoke but have had issues with it throughout my life. I always wondered why I had trouble being around my grandpa when he smoked and it wasn't until after he died that we found out I was highly sensitive to the point of an allergy reaction. My throat tightens, lungs start closing and I start coughing really hard going toward hyperventilating. I've had to be rushed to the hospital and placed on oxygen for awhile to get me back on track. I've only met 1 other person recently with this same trouble is there anyone else who is sensitive/allergic to cigarette smoke? Thank you!