I know this post's title is How to Raise Your Vibration When You Feel Fear
, and you didn't say you're specifically afraid, but I feel that Erin's suggestions are valuable improving the way we feel no matter what the cause.
When I am going to sleep and my mind is busy with something, I imagine putting the issue in a cardboard box, closing the lid, and setting it aside. I say to myself, "I am putting this away for now because it's time to go to sleep. If it is important that I come back to it, I can deal with it tomorrow." It works!