A personal mantra is a useful way to stop you panicking. By repeating your personal mantra, this becomes the 'pause' button for your brain, so that you can take a deep breath, and then get perspective on the issue at hand. This is a simple way to re-train your brain, and give you a sense of taking back your 'personal power'.
So what, now what? Choose a phrase that will remind you in times of stress, that 'this too will pass':
I am stronger than I think. Life is tough, but I am tougher I am not alone.