I went to an event with about over 700 people and came back with a cold which seems normal because some people were sneezing so I knew I had to get something. But one day my throat started hurting when i swallowed, three days later i blow my nose and my mucus is VERY green but it was only once. Now Im congested, my nose is filled with mucus, Im sneezing, and the worst thing is that when I breath my left rib cage hurts. It feels like some type of stinging sensation near my heart and chest bone. Can anybody help me please?