Next time you have a moment of doubt, worry, or fear. Stop and take a step back from the situation. Where are these thoughts really coming from? Is it a place of love and truth where your Higher Self resides or is it your Ego?
Acknowledge that these thoughts exist and detach yourself from them saying - "You do not define my experience, that is for my own choosing."
Then send Reiki to the problem area, and yourself (if you desire). Smile happily to yourself and thank Spirit/Source/the Universe that you were given this opportunity to heal this issue.