[agumonkey]

"Funny", after grief, I started to feel tons of problems, but also heart issues (as mentioned in another comment in this thread). Although it was way more than tingling and sensations (pain in fingers arteries, arm veins, heart, all felt like tiny clogging things moving around), I couldn't lift my arms, run or do any sort of efforts, for an ex athlete it was very damaging.

Anyway I also did the same tests as yours. Things looked normal, but I dismissed their tests (a 5min effort test is not enough, you can exhaust yourself in 5 minute, you'd need 15minutes sustained effort to trigger change in heart and vascular regime). After 2 different doctors, I finally accepted the SSRI pill. It did affect my state tremendously for 2 days, mostly brain and lung. Still not good enough on the muscular/stamina side though.

Body is a complex machine.