this is what i had...and recovering from.

my diagnosis..after the fact:

What is the flu?
Influenza, the flu, is caused by a specific virus that typically comes around each fall or winter. People who get the flu usually have an abrupt onset of fever, muscle aches, headache, sore throat, cough, and weakness, usually lasting two to seven days. The cough and weakness can last for up to six weeks making physical activity and even day to day tasks difficult.

http://www.toronto.ca/health/flu/flu_facts.htm#what

it sucks. get your flu shot if you can.