Most people do not know why anxiety hits them when they think they are doing good. For you which came first the pain or the anxiety.
Your physician is the professional and a heart rate in the 60s range is normal.
Face your fears and you may find that they were not near as awful as you anticipated. Kick those fears to the curb and practice getting through the small fears before you attack you largest phobias.
Bless you and I hope to get to know you better.