All of us have monsters, volcanos, and treasures buried deep in the dark corners of our heart. I know I wondered why I couldn't control certain aspects of my behavior, which caused me all sorts of troubles. I went to my towns library, this was before the internet and looked for books on how to let go of trauma that is how I found meditation and got into philosophical studies in Buddhism.

The breathing exercises are good for helping calm the mind and bring it to a pin point focus for certain kinds of meditation. One doesn't need meditation to focus on the breath for a few minutes and it'll take your heart rate down fast, cool one off quick but that takes practice too.

The mind can only focus on one thing at a time. What the problem is using the breath or any other thing to keep calm won't address the core of the problem which is conditioned reaction to sensation one likes or does not like. Dissolving conditioning is the hard part...hehehe.... I'm going to a vipassana retreat sometime in April, I need to reserve a spot now! I try and go once a year...back in my early 30s and 40s I did several retreats a year plus I served several retreats. I like SN Goenka's no frills retreats, they are free, but donations are asked at the end of the retreat and we focus on the Satipattana related to vedana, which is mind and body sensation and our conditioned reaction to sensation. http://www.vipassana.co/Sensation-The-Key-to-Satipattana

I used to write about this stuff all the time now I don't feel the need. But I'll post my adventures to the retreat this year. Weird things always happen when I plan to go to retreats...hahaha