Right there with you. I felt like I got hit by a truck, and wound up going to the hospital for IV + Tamiflu. Took three weeks to feel normal again, and usually I'm over a cold or actual flu within a week. I never skip getting my flu shot, either.

Two things come to mind: The first is that the day I went to the hospital, there were so many of us with similar symptoms that we overflowed down the hallway. Second, when the triage nurse was talking to me, she off-handedly commented that everyone was saying they'd gotten their flu shots, yet there we were. We both kind of shrugged and guessed it just wasn't a very effective year.

Now I very much wonder.