My whole body is fatigued and in pain. what could it be?

Fibro myalgia: You are a bit young, but you could have fibromyalgia.Discuss your problem with your pcp. He may want to refer you to a rheumotologist.

Several things: You might have a viral illness, or this could be the early sign of a rheumatologic condition. In our area of pa, we need to consider lyme disease also. If the symptoms persist, you should see a doctor and get some lab work done.