I don't normally get the shot, cause I agree with Japhydog.

However, in your case, I would hustle to a doctor and get his thoughts. Bronchitis can develop into some pretty serious stuff. My brother's run-of-the-mill case of bronchitis developed into a particularly bad and drug resistant case of pneumonia within days. He was in the hospital for three weeks and for a couple of days it didn't look like he would make it. It's a long, slow recovery. His lung function probably will not return to normal.

Make an appointment with your doctor and discuss it.