Hi. I Am Asthmatic, I Have A Really Bad Cough

Hi. I am asthmatic, I have a really bad cough right now and nose, sinus and chest congestion. I'm taking an antibotic (Cefuroxime 500mg) that isn't working, and I threw up the last two. My coughing is periodic but intense, it seems to increase when I take my inhaler and even when I eat. I can't see my doctor until tomorrow, any ideas as to how I can get some relief tonight?