What Causes Dizziness And Body Aches?

29, female, WAY over weight, but no history of high blood pressure, diabetes, or anything like that. My grandfather just died...and i have been holding it together. But today when i woke up i was light headed dizzy and achy all over...and i just can't really get up. But I want to...I have a lot to do, but i can not just do anything right now without feeling worse. I have drank water and juice and ran cool water over my head trying to shake it but it will not work. What do i need to do to feel better in the immediate future (next 2-3 hours)?