I am also in my 50's. I experienced some concerns in my late 30's, but I was diagnosed with a murmur and MVP. I was diagnosed about 8 years ago with HOCM. No one really clarified much with me, and camzyos was still really new. I moved to another state for a job, and I did not care for my cardiologist. I finally got one that I trust about 2 years ago. I started on camzyos in April. I had an ICD implanted in May. The results are a small improvement, but not nearly what they should be. I am scheduled at Mayo for a septal myectomy in November. The anxiety is real, and it is okay for you to spend time processing it. I think for some people it might be helpful to process this with a counselor that works with people with chronic illnesses or maybe a clergy person...
I do think it is normal to have these feelings. It is a lot to deal with. Be kind to yourself, and do the things that bring you joy. Don't let the anxiety steal all your living. You have a lot of that to do! Praying prayers of peace for you.