I feel like that, think its just a thoroughly horrid cold/cough - there seem to be extra lots of them around atm. But although I feel achey/shivery, I have no fever....so mine is definitely not flu.
I had the flu jab one year (had lowered immunity at the time) and caught it anyway, but it was much milder than dp's version, lower temps, lasted less time, etc.
Hope yo'ure better soon, and that its NOT flu....(and isn't it a bit early in the season for flu to be hitting, or am I out of date?!)