Re: possible cfs?
Well, headaches and fatigue are common, as are swollen glands--though those could also contribute to various other conditions.
Whenever I start feeling worse, the glands in my neck swell, and when I actually have a virus, I can barely move it.
When they were trying to figure out what I had (I had a mono-like virus, but I never recovered) my sed (I think it was sed?) was a bit elevated when I went to the infectious disease doctor, but it wasn't alarmingly so.
Some people do have recurrent infections in CFS, or so I've heard--as far as I know, I don't have any infections, but I've talked to other people who do.
Maybe you should see more doctors, infectious disease, whoever else might be able to figure it out.
CFS symptoms are EXTREMELY vague. Several of them can be applied to viruses, or any number of other things, so it's vital that you check out every possible answer before you think of CFS.
If there are some relatively abnormal things coming up in your tests, you should check everything else out first, because people are only diagnosed with CFS unless everything else has been eliminated as a possible answer--it's not foolproof, obviously, since so many people get misdiagnosed, but it's just important for you to get as much information as possible :].
I know how it feels to be so young--I'm seventeen now, and I've had CFS since I was fifteen.