2 weeks ago i smoked 5 cigarettes my throat hasn't stopped hurting since. the back of my throat has some mucus and i've been congested. what is it?

Probably a virus: Smoking can irritate the throat (and irritate your entire body) but any irritation should have healed by now. I am guessing that the irritation to your system lead you to get a viral infection. I advise trying Umcka (from health food stores), an herbal remedy proven to help colds and sinus infections. I hope you have learned from this and will never smoke again. See http://tinyurl.com/lblldw