How to get my voice back after being sick!?

Starting on friday i began to get sick. Through the weekend I had a bad runny nose and a slight cough. Saturday night is when my voice started to sound funny. I'm uming its because of the phlegm surrounding my throat/vocal chords? Anyways, I have sounding like a dying man (I'm a teenage girl) and I need to sound normal again! Any tips? And how long will this last? PS when I try to clear my throat it is very sore and achy. Thanks!