P.W.
I have a spot in my hip that vibrates on occasion. I always think my cell phone is in my pocket on vibrate, but that is rarely the case. This has gone on for a few years, but I'm healthy as an ox.
I used to worry more than I do now. I think having young children and the weight of that responsibility makes it worse. If you can work on knowing that all will be okay no matter what, and that certain things are out of your control, it will help. For example let's say you did die. It would of course be rough but your family would survive it.
But try to think more positively. Visualize your health. I believe if we see ourselves as healthy it will help us be healthy. However, if we see ourselves as sick we can bring on distress. I'm not saying you will make yourself die! But certainly you are causing yourself stress and illness... and what good does that stress do?
Here is the bottom line.
Worrying does not stop things from happening. Worrying is worthless.