Socks,

This is a common frustration. The anxiety of thoughts rushing is likely due to you trying to hard. It only makes it worse for me. My trick is to look around the room and sort of distract my mind with other images and words. It works some times as my mind lets go of the search and switches between the other stimuli.

Don't let it get to you. It will only make it worse.

Hope my trick helps. My best to you.