Worry is like a rocking chair; It gives you something to do but never gets you anywhere. Just relax and take of your health. There's no need to worry if you're not doing anything particular to hurt your health, such as smoking or excessive drinking.
Do you believe there is a God? He is your Creator and loves you. This is what he says you should do about your worries: book of Luke chapter 12 verses 27 thru 31 Then Jesus said to his disciples:“Therefore I tell you, do not worry about your life, what you will eat; or about your body, what you will wear. For life is more than food, and the body more than clothes. Consider the ravens:They do not sow or reap, they have no storeroom or barn; yet God feeds them. And how much more valuable you are than birds! Who of you by worrying can add a single hour to your life? Since you cannot do this very little thing, why do you worry about the rest?