It seems most of us here are jumpers...our minds insist on something to stimulate the fight or flight response. For me it's uncanny - usually less than 24 hours after one ailment has been disproven (this last time, pancreatic cancer-VERY popular with HA sufferers) another symptom will slide in, discreetly at first, to take its place. Now for me, heart palpitations have stolen the spotlight. A few minor thumps in the chest 2 months ago has graduated, with honors, to full on heart anxiety. 3 ecg's and a 48 hour halter monitor later and a stress test coming up.
What will happen when that too turns out normal? Hmmmm - your guess is as good as mine.
Point is, our rational minds know what is going on, but our physical responses take their marching orders from our primitive brains. And in my case (and most others on this forum, I would guess) I always have that primitive brain humming in the background like a unseen computer application generating fear, fear, fear. There are ways to turn that around, as many here demonstrate.
I've been convinced I have brain tumors, anal cancer, ALS, MS, Colon cancer, bone cancer, pancreatic and liver cancer, heart disease, diabetes, just to name a few. Yeah, there are more. Of course, I've actually had none.
I'm in CBT and small dosage meds, which do help to some extent, but I'm still working, as are most of the folks who visit this site. We must keep fighting and striving to kick the panic/anxiety to the curb. It is possible! I had a nice 2 year break in all of this until some stressful periods (combined with my dismissing the meds for quite a while) retriggered my HA. So I know it's possible to get rid of it - we just have to remain on top of it. My best to everyone on this site, reading these responses, and many success stories, keeps me going and hopeful that a normal life is very much possible for all of us.
My Primary Doc, who is a God send, told me once, on the downside of an episode, "You're healthy, but you have this anxiety thing. Treat it aggressively - it's like any other illness that needs attention." No shame, no 'it's all in your head." Just fight it and it will eventually get better!