First step is to notice and become aware of how you breathe.
Here is an easy exercise you can use immediately to bring yourself out of hyper-alert and back into a calming state.
This exercise can be done as often as you need and you can do it while sitting down or standing up.
For tips to stay calm and resilient watch my video: https://www.youtube.com/watch?v=l3WHFmNnjJs
More tips to follow!