Hi Michele,
I'm so happy for you that you found the cancer early.
I can totally relate to the anxiety. It can be both positive and negative. As people with serious health problems we need to pay attention to changes in our bodies and follow up with a visit to our health provider if indicated. The other type of anxiety/fear is the type that happens when we let our imaginations go to all the bad possibilities. That type just wears you down for no good purpose.
I was a psychotherapist before I had to stop because of the cancer. I helped people to develop a variety of skills to manage anxiety. Thought stopping is very helpful when dealing with One's imagination. After awareness of the negative thoughts and images one can stop them and replace them with positive images. It's like making a "movie" of your positive future. See yourself doing something you love, as a healthy person in the future. The more sensory aspects you can add, the better. See yourself, hear the related sounds, notice the smells, your bodies position and how it feels to touching the objects around you etc...
It takes a little practice but can be vey helpful. The practicing is best done when your not anxious as it's difficult to learn something new once anxiety is activated. If it's too difficult to do on your own there are lots of recorded guided imagery that can be down loaded.
Hope that helps.
Enjoy your happiness.
Lydia