It could be either anixety or asthma, but both need doctor's treatment. Hope you feel better soon.
See your dr. You are in a serious asthma flare and need propper treatment now. Since you already know you have bronchitis, that raises your risks. Don't put this off any longer. Either be a walk-in to your dr's office, or call and ask if he/she wants you to go to an ER.
I hope you feel better.