Cough and wheezing, help?

I've had a cold (blocked nose, sore throat, sneezing etc) for about 5 days now. Most of the symptoms are gone accept that i have a lot of phlegm. I cough to get it out, but i'm also wheezing, when i breathe in it makes a crackling noise and i feel a tightness in my chest. I don't have asthma and i've never needed a puffer. I feel like i'm not able to take a full deep breathe without it hurting. I have a doctor booked for wednesday, what should i do in the mean time?