It is quite common to worry about various conditions when we are experiencing anxiety in my opinion....especially when it as affected a loved one. For example, my original experience with anxiety came with concerns about my heart health after my grandfather had passed away from complications from heart disease. In my mind, I experienced all the classic symptoms of someone that was experiencing heart problems....chest pains, palpatations, etc...you name it, I felt it. I became so hyper aware of symptoms that I felt every little pain, twinge, etc. I also misinterepreted many of my feelings and symptoms as something wrong with my heart, when in fact it was just a normal part of daily life.
What does your doctor say about it? You said that you do experience anxiety...are you able to get counseling to learn to confront it?