Have you ever worn a monitor for a few weeks to allow these patterns to be analyzed? I went through something very similar to what you are experiencing, and it was making me a wreck. Obviously, I’m not a doctor, but I wore a Zio patch for two weeks and after seeing the results and hearing my doctors analysis, I felt so much relief that I think I was able to move past this feeling and the anxiety that accompanied it. Just knowing what is going on makes such a difference in my opinion. The Zio patch was a dream. It was put on in the doctors office and not removed until two weeks later. You go about your daily life without even thinking about it being there. You can shower and everything wearing it. You push a button on the device and record. either in a book or via an app, exactly what you’re doing and how you’re feeling when this racing starts. It was a great help to me and might offer some answers to you and your physician. I hope this helps in some way. Good luck to you!