Have you been having problems with your health? If so, it might be nothing: or it might be something. The stress of not knowing is probably much worse than the reality of the situation, so do yourself a favor by make a doctor's appointment. You have to understand that nothing in your life is going to change unless you make a move to change it: this applies to every aspect of your life, not just your health. The sooner you start something, the sooner you'll be finished.