I think I'm suffering from a rare disease! please help me...anyone!?

Whenever I go out in the cold without a jacket, I get a cough and runny nose and my body gets chilly. I asked my doctor about what could be wrong with me, but he had no idea and neither does anybody else. Please help me... My immune system must be deficient and I'm not about to start wearing jackets so don't even request such a bogus idea/