What do I have?

I have a tickle in my throat that makes me cough off and on. I also have chest congestion that you can hear sometimes when I cough. I don't know if my sinuses are draining or if its something else. I also have this pain like symptom in my sternum in the middle of my chest. I thought it was trapped gas but it isn't. The pain is similar to indigestion.

I have no stuffy noses, no fever. Just a cough from that tickle at times and that chest congestion pain..very mild.