I have laryngitis and chest congestion, need advice?

I just recently caught a virus about 2 days , my throat has been sore , and in the last 12 hours have almost completely lost my voice, PLUS I am also very congested. My girlfriend told me to get Mucinex to help the congestion, but then as I read about Laryngitis remedies, they say to stay away from drugs like Mucinex. Does anyone know what to do?