I had a problem with an old truck where with no warning the ignition system would just die -- Being a stubborn guy I kept working on it for months and it took a long time to finally fix (with the help I might add of a group very much like this, devoted to Slant Six engines, and one of the two people who helped me get it was in Argentina!)

Each time I thought I had it fixed, the darn thing would pop up again (After a while I learned that all I had to do was cycle the ignition off/on and restart while rolling) and my stomach would drop right thru the floorboards.

I finally fixed the truck more than two years ago, and have gotten a newer one more than a year ago, yet if I am going up a hill and my new truck downshifts in just a certain way, my stomach feels that trigger, remembers the stress of waiting and wondering and being ready for the next ignition cut-out and drops right thru the floorboards of my "new" truck.

What I'm saying here is that we are building up a new set of stressors for our bodies to deal with and it's going to take some time for our systems to decide what's real and what isn't...

See the Doc and maybe even get a second opinion -- Once you have done all YOU can do, a lot of anxiety seems to melt away.

Pete

PS For gearheads, the ignition problem turned out to be a faulty Run pickup coil in the distributor -- Apparently when it got hot enuf, it would do some sort of electrical field sieze-up and no longer respond to distributor magnet pulses -- Cycle on/off and sieze-up cleared for a while, sometimes minutes, sometimes days.