Why don't I feel good? It's been five days now and still the same. Started with a fever.?

You might want to get a checkup with your doctor. This doesn't sound good, it doesn't sound like a flu or cold or anything of that nature. I don't mean to scare you, but you are at that age when heart problems can start, some of the symptoms are weakness, dizziness, indigestion, nausea and sweating. Since you were working out at the time, I can't help but think you may have overexerted yourself and may have caused a strain. You can also get those symptoms from being dehydrated - that can affect the body as seriously as a heart attack. People can die from dehydration. First, get to a doctor and tell them everything. Second, keep aspirin with you at all times - if there is even a remote chance that it is heart related taking one aspirin can save your life. Not tylenol or motrin - aspirin is what helps. Third, do not do any working out until you get checked out. Fourth, drink a lot of water, and Gatorade or other hydrating sport drink. It could simply be overexertion so try not to get too worked up, but get checked out.