@3boysmum, happy new year. I think we all worry about that. It’s great that you’re working as this can help take your mind off it a bit. I’m not sure how long ago your treatment was, but I have found that at the 3 year mark I’m a bit less focused on a recurrence. Having said that I’m house hunting and that does come into my thoughts sometimes.
My counsellor once said thoughts like those are like picking up a book from your library, you can pick it up and have a read but you have to find a place for it. These thoughts probably don’t go away, but they find a place in our lives. All the best with your new job. x