There's really not much use to go to a doctor unless you're really fucked up by specific symptoms and need a diagnosis or you want something specific out of them: (drugs, blood test, surgery, referral)
There's no compelling reason to visit a general physician regularly, all they do is take your blood pressure, squeeze your balls and touch your stomach. Learn to pay better attention to your body, and note down when something feels off or painful.
Plus, you should be able to see whether or not you're a fat fuck, and it becomes an aesthetic issue way before it becomes a health issue you dumbfuck.