I ve had a mix of what has felt like sinusitis and an upper respiratory tract infection for about 3 days now. It started with a sore throat that I could feel in my ears (if that makes sense), almost like an itchy sensation, hard to describe. That was day one. On day two it progressed to congestion in my sinues (pressure in my forehead and nasal sinuses), then on to stuffy/runny nose, and sneezing. On day three I have a burning sensation in the upper broncial tree area of my chest and I have a slight productive cough, with light yellow sputum. Do I need an antibiotic or do I just need to ride this thing out until my immune system kicks in? Don t wanna waste a co-pay. Thanks in advance!