It's funny I should read this today. I was just realizing how unenjoyable life is becoming due to constantly worrying about SOMETHING! I don't have any particular disease in mind, but every single little thing I notice or find, I start obsessing how it could be SOMETHING. ALL the time! Lately all I've been hearing is people I know dying and being "diagnosed" (3 people in 12 days and it sent me "over the edge") and I am becoming depressed and worried constantly. Like I am walking through a minefield with all these people and they are being hit with something and I'm escaping by the skin of my teeth, but knowing that one day I will be HIT. I don't know when or with what, and that thought is "crippling" me. I have already decided to go see a psychologist. I'm calling tomorrow. I've been crying on and off since I got up this morning.
And like you, I am terrified of being tested and there's always something new cropping up. I think it would be a waste of time for me to be tested because I'd be fine for 2 or 3 weeks after a test then think, "Well NOW I have something, better go back..." getting tested won't help, so I choose to worry until things go away. (I just took a Xanax hoping I'll feel better later)