I Have The Respitory Infection That Is Going Around. I

I have the respitory infection that is going around. I have asthma and it feels like my throat is closing up on me. I've been have been treating myself with theraflu severe cough and cold and zicam but I seem to be getting worse. I usually need an antibiotic to get past this. I am allergic to erythromiasin, sulfa and macrodantin.