Suggest Treatment For Cough And Shortness Of Breath

I ve been having difficultly breathing for a little over a week now. I thought it was allergies, since I also have a very stuffed up nose. But when I blow my nose the mucus is yellow/green and sometimes when I cough, phlegm comes up too. the shortness of breath seems to happen randomly throughout tje day and even if I sit completely still, it s a struggle to take deep breaths. I do have asthma, but haven t seen a specialist or needed to in over 5 years, and also have not needed my inhaler in that amount of time.