Hello and welcome. Just about everyone feels that way at some stage! It's the most normal thing in our circumstances. Not a particularly productive practice but we have all been there. Before cancer, it's something that Will Never Happen To Us. After diagnosis, we cross that line. We know that's not true and that wonderful bit of self protection is gone forever. So the nasty little thought runs through our head. Give it no house room, chuck it out. The worry has no positive outcomes at all. Be good if you could think cancer away, but you can't. All you will do is spend precious time worrying about something that may never happen. Time enough to do that if it does actually recur. But you have an excellent prognosis. You have done everything to reduce the chances of recurrence. Now take a deep breath and move on. Best wishes.