As a dispassionate observer who wants the best outcome for everyone, including using cold, and old-fashioned, reasoning, I would say you may set yourself up for a ton or two of regret if you don't deal with this forcefully, determinedly, and in spite of misgivings and fear/anxiety. Putting things off generally gives them more time to take a stronger foothold, which in turn makes them more resistant to treatment. Things about the heart tend to progress, but not in the way you hope.

My cardiologist, over a three year period, asked me to submit to two separate MIBI stress tests on a treadmill. Each involved approximately the equivalent of 500 chest x-rays, and I was required to sign a waiver attesting that I had been advised of this and that I was willing to undergo the procedures notwithstanding. Included in the workups until an electrophysiologist agreed to ablate my left atrium were an MRI, chest x-rays, echocardiogram, and an angiogram, the latter of which requires exposure to fluoroscopy. So, I now glow in the dark. But, I'm happily responding to your post with my all marbles, now three years free of the atrial fibrillation that plagued me, thanks to an ablation.

About the worst you'll get is a 'hot flash' when they inject the contrast dye, or maybe you'll want to reach up and scratch your nose when in the CT donut...which you may not do.

Last thing, and it's just me: I gotstuh know. I read, read, read, watch videos posted by physicians and physician groups at symposia, and have learned that nobody can, or should, care more about what lies ahead for me than I. This means it is incumbent upon me to direct my time and energy toward resolving matters that arise and that threaten normalcy and peace of mind. This, in turn, means I must be realistic, pragmatic, and courageous when confronting things that will still be there if I turn my back on them, and then later look back to see if they have gone away. They never do. Mostly, they get bigger.