Hey Miss Anxiety,
Welcome to the group you never wanted to belong to. I, myself, deal with health anxiety. And, like you, I have focused on different areas of my body throughout my life. I've had more fingers in places than I care to admit. I've had it all, too, including ultrasounds, MRI's, countless blood-tests - all normal.
Since December, I've had terrible anxiety about my heart. So bad, in fact, that I caused - through stress - my heart to begin skipping beats. This, of course, made me stress more. So, I had bloods, EGC, a 24-hour monitor, and an ultrasound... which all came back clear. The only problem - I've got massive chest pains. I wake in the night with them. I stress about them. I am worried sick about them.
Oh, and I went on a 12km run today.
We battle the illogical side of us with the logical side. There are moments of complete clarity. Then those are overshadowed by fear.
For me, the ultimate fear is... probably like you... death. I don't want to die. And I don't want to suffer.
I currently use the app called Headspace. It's an investment (about $100 for the year), but it has some great programs about anxiety and meditation. It also has a VAST library devoted to helping you sleep. Nature sounds, gentle music, people reading you a boring story. It helps in those truly terrifying moments.
I also play the longevity game with myself. If the problem truly is something horrendous, then I'd be getting very, very sick. I usually wait a week, or a couple, and monitor my symptoms. If there is no change, then it's nothing. Or if it comes and goes, then it's nothing.
Anxiety is a very powerful thing. It can disrupt the very electricity in your body. It can make your heart skip beats. What I'm saying is this - anxiety is like an energy drink, heightening all your thoughts and feelings by 100.
Keep talking to people, keep sharing your stories. Invite your friends into your own thoughts and feelings. Help them understand you. My friend makes a consistent effort to make me run 12km. I hate him. But I love him too.
I hope this helps.