Not dumb! http://en.wikipedia.org/wiki/Chronic_fatigue_syndrome

(another "name" for the syndrome I believe)

((((((((((((Miss Laura)))))))))))))))

If you're worried about it at all... go see a doctor. To me? It sounds like you're dealing with normal symptoms having to do with stress and stuff and normal day-to-day activities... but only your doctor will know for sure. Hope your appointment goes okay. Let us know.