Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

I try to lie still, take some slow, deep breaths, try to just close my eyes and relax for a couple minutes.
You are not alone. Keep writing it out!
I'm another who gets heart palpitations on a fairly routine basis. They are scary.
Breathing exercises, gentle stretches, journaling and/or talking out my anxieties of the day with a therapy peer supporter are my most effective remedy.
Gentle support while you find what works for you.
It happens when your anxiety level switches, and it actually means you're making changes in your well-being.
Best wishes as you find your better balance naturally.