It seems to me that when you worry about something, you are generally engaging a darker emotion. When you are worrying, you are not feeling blissful. Instead you are feeling distracted, negative, not engaged in mindfulness. Hidden behind worry are usually other feelings, like a worry about money, which in turn may be signalling an attachment to security or an attachment to a worldly commitments.
So when you find a worry, that is an opportunity to come face-to-face with your deep attachments, and to acknowledge the things that you are still clinging to. If you respond by pushing the worry away, you are not making full use of the opportunity, instead it is better to tease it out, to gradually apply insight and see what is hidden.