Clearly understand, there isn't any situation that isn't made worse by worry. Worry never solves anything. Worry never prevents anything. Worry never heals anything. Worry serves only one purpose... it makes matters worse.
You don't decide what your purpose is in life you discover it. Your purpose is your reason for living.
Your real purpose in life is to develop yourself. To successfully do this you must always be working toward a goal.
Your purpose is why you you're living, your vision is how you're going to execute it.