(((ariesmars))) - sorry you're sick. The flu shot, just protects again whatever flu the medical community thinks is coming. There may be one that slipped in or this is an upper respiratory virus. I had pneumonia a couple months ago that lasted over a month. If it doesn't improve in a few days or you develop a constant high fever...do visit your doctor. Take an ibuprofen since this works better for body aches. Hope you feel better soon.