Hi RO and welcome!
I am sorry that you are experiencing this worry regarding your health currently. Anxiety can certainly cause catastrophic thinking and allow our imaginations to run wild with worst case scenarios.
However, the fact is that you have been checked out by two doctors who are not concerned, and in fact have told you that all is normal and well. This is good news!
The tough part is believing this in spite of the anxiety trying to tell you otherwise!
In our Resources at the top of the main forum page here, you'll find self help for health anxiety. The links and book suggestions should be helpful in starting to deal with this fear. We also have help for lowering anxiety in general, which will in turn help your health worries as well.
If you find that you are still struggling...then talking to your doctor about
an anxiety management plan should be your next step.
Wishing you progress and relief. Post with us anytime.
Scaredy Cat