My lung cancer was caught in pretty much the same way. Something 4 years ago showed up on a CT which was of my abdomen. It wasn't malignant but Mayo told me to have a CT scan every 6 months. One year later it had become malignant. I had VAT also (now 3 years ago). Other spots have shown up but none have changed. I have not passed the 3 year mark so now will only get my CT annually. Certainly I think about whether any of the others will change, but I feel confident that the original malignant tumor is gone. I also had breast cancer (20 years ago), so I knew that once you have a cancer you always are aware that you might get another, but I take deep breaths when my anxiety gets high - take a walk - cook - or do something that makes me focus on something other than myself. Take care.