Why does my chest burn when i cough?

This makes me sad, I hate being sick :(

Yesterday, I was fine, I had a little itch in the back of my throat, so I gargled salt water.
This morning I'm achy, my nose is a tad runny, I have a really bad cough, and my chest burns like crazy when I cough a lot. Almost like stomach acid burn (I doubt it's that though.)

Any remedies?
Please refrain from the easy "Go see a doctor."
That appointment is already booked for Tuesday! So thank you for your concern, but I'm looking for people with experience here :)