I feel exactly the same, and just within the past couple weeks have been faced with a grim situation with my mother. My anxiety was already high, but this made me consider checking into a psych hospital. The situation isn't resolved but I am desensitizing to it. The serenity prayer has helped me. Stoicism is helpful as well, it just takes strength to put it into practice.

When you tear yourself apart thinking of it, you are already experiencing it as far as your mind is concerned. When it eventually comes, you will face it with the same mental faculty that you possess today, if not a stronger one. Everyone who has ever been experiences this, and everyone yet to come will as well.

If you are having panic attacks daily because of this you definitely need to get help. Get into therapy so you can get this under control.