Sorry you've got the horrible bug! I've had one really, really bad flu and one that was just really bad. Wouldn't wish either of them on my worst enemy. I guess the only good part is that if you haven't slept in that long, the worst must be nearly over. I wasn't ever hopelessly ruined for more than three days, and then it was merely awful. The worst one had a long recovery, taking about a month to get back to feeling right, although I was functional within a week. Hope yours doesn't take as long and particularly that you can sleep soon.
I had it before a few times and boy does it suck. Anyways I would really suggest taking Nyquil either in gel capped pills or the lquid kind. The latter being the perrfered method for me at least. Also eat rather light foods/drinks.
I've never had the flu. If I get the flu, I'll probably end up in a hospital. I have severe respiratory illness induced asthma. When I was younger I had a week immune system too so if I had gotten the flu when i was younger I probably would have died.