Wow! I think I can relate to your fear and anxiety. I developed vtach (mostly nonsustained)
from scar tissue following valve surgery in 2017. I also had assorted PVCs, pacs, svt, bigemi ny, etc. I lived in fear and my life was devastated while they sorted it all out. I thought life as I knew it (I’m active and enjoy backpacking. etc.)was over. They got me onto medication that worked(flecainide), did two ablations that were partially successful, and I was able to continue with life as I knew it, thank God. However, I still had some arrhythmias and continued to be afraid and anxious. Sleep was also a problem.
Right now, it sounds like sleep deprivation and fear are the primary issues. Can you go back to the dr who prescribed the Xanax and see if they will increase the dosage or recommend something else? I am also on Xanax for anxiety 2mg per day as needed and can honestly say it has made it possible to live a normal life. I also note, that it seems to decrease the PVCs, etc.
Have they told you about valsalva maneuvers like coughing? I have frequently broken or headed off a run that way. I don’t seem to have AFIB, but it still might be useful.
Are your drs at all understanding or comforting? My experience has been that some are while others just don’t get it. Maybe get a counselor or someone you can talk to when you are afraid. Most cities have a referral system or crisis line you can call.
Please don’t wait; it sounds like the mental and physical are feeding off each other.
You’ve come to the right place here; welcome. I’ve always found caring and responsive people.
Please let us know how you’re doing.