Hey Erin!
The first few days of Atkins are ALWAYS rough. Apparently that effect DOES go away after a few days. It's so common, it's called the "Atkins Flu". So that ickiness doesn't last forever. It's essentially withdrawal from sugar.
That said, there are lots of other plans out there to experiment with. Calorie Counting, Weigh Watchers, South Beach...they're all great programs with lots of people posting about them here.
You might also want to look at our "20-somethings" forum, for those in that age range.
Anyway, stick around and keep posting. Can't wait to get to know you better!