I have the flu please help

So Monday I started feeling crappy and this morning I went to the doctors to find out that I have a flu they gave me a flu medicine to help shorten the length of me being sick and also gave me a cough syrup with codeine in it but I can't swallow or eat or even drink because it hurts so so bad my throat is swollen I lost my voice and I have a fever I just tried to take a detox bath does anyone have any other suggestions on what else I could take or do to help with my throat I'm trying to drink as much water as I can but it hurts so so bad