I have had anxiety and depression for over 20 years. For the first ten years I had every disease known to man. Anything I saw on TV or read in the paper.. I had it!! I had one read mark on my face one day and was sure I had small pox. That's how far out I was. It's really a terible feeling.
For the last ten years, I have found a little bit of relief. When I hurt in some place, I ask my husband what he thinks it is. When I think I have a disease, I ask him if he thinks it's cancer. Somehow, when he assures me it's nothing and will probably be gone the next day, I'm ok and don't worry for a little while.
Much like you, I wasn't worrying about cancer when they found a 5 inch tumor in my left upper arm. It was cancer, but the bone was removed and I'm fine now. (well, fine as far as cancer goes)
Hang in there. I think a lot of people feel like this. It comes with the territory.
Take Care.........Connie