I have a Tibetan bowl that many people have found quite relaxing. However, not all people like the same pitch. This post links to a page that has a number of differently pitched Tibetan bowl sounds. Each link on the page will take you to a 5 min track of a Tibetan bowl at a different pitch. Find one you like and relax.
One purpose of these Tibetan bowl tracks, the paced breathing tracks, and any of the relaxation tracks you can find on this site is to help you relax and recover from stress.
Another equally important function is that they should help you disengage your attention from useless focusing on what is making you uneasy and enable you to shift your attention to what may reduce your difficulty. More on this in a couple of days.