sinusitis
"I had a tickle in my throat and very tired on day one. Then day 3 a dry hacking cough and then runny nose and congestion. Day 5 woke up to bad sinus headache and pressure but not getting better and worse cough. Day 7 I felt like death warmed over and couldn't take it anymore. 
Went to doctor and got 5 day Zpak and inhaler. Took day 1 dose and next morning felt much better and lot of the sinus pressure and headache were gone. By dose Day 4 much much better and only small cough now. "