That really sucks! Sorry to hear about it. I do hope you get better soon.
I've had some type of stomach flu before, but when I had it, it actually was gone in just 2 days. But I was pretty miserable for the first day, and weak and tired for most of the second day (because I'd puked out almost everything in my stomach, and I couldn't really eat much else). To have it for a week is just...ugh.