I have had to struggle with reacting since before living with Fibromyalgia. Lately, my reactions have become more intense. Without details, lots and lots of stressors/triggers, for too long. I found this article on the Wise Brain Bulletin. It really explains our brains circuitry without being too scientific. It also has ways to rewire our hardwired reactions.
I have used some of these before and intend to start reinserting them into my today. I hope this link assists you as well.
Lucinda Tart, Fibromyalgia Peer Advocate/Life Coach Advisor