Green mucus in nose that has bad smell and taste

I had what I thought was a sinus infection. I had very green mucus in my nose that has a very terrible smell. I can even smell it on my breath and taste it. I went to the doctor. She put me on a 10 day antibiotic (2x's/day). I am finished with the antibiotic, and have been for about 5 days. It never got better and I continue to have the same thing. It's rather annoying and I just want it gone. Can someone please tell me what it is and how to get rid of it!