Please help! i have a cough n i need advice!?

ive had a cold for 2days i have a headache n pressure between my eyes...n a cough that when i spit it comes up thick n greenish brown in color. Im having a hard time breathing as if i cant catch my breath.,my chest feels tight inside. I been taking nyquil n i benn using chloraseptic for my throat. What else can i do for this cough? My upper back is hurting too. Please somebody help!!!!!! Thanks n God bless you.