HAHA, bleeding? Isn't that an old medieval wives tale that you could 'bleed out' an illness?
If I may be so bold...
Could it possibly be attributed to the fact that you may be a smoker? Cigs or the wacky kind! People ask questions but sometimes do not like to divulge ALL of the info. The fact that you went to a party when you are sick... breathing in smoke from others definitely can mess with you. Anyone around you smoking or "putting something in the air" that could be contributing to your nightly cough? I know friends that won't quit smoking when they are sick and it just keeps them sicker/coughing longer. One of those "errr, DUH!" moments.
Hey, I'm just sayin'...