Today, I have three days off from work; will be back on my 3g niacin dose again.

What I changed was moving from 2 to 1 meal a day; and that was when I got pounding heart at night, then got thrown a big bunch of stressors. So I'm back to two meals a day; basically rewinding to a plan that seemed to be working for me.

When I was very sick, I had trouble getting into ketosis. I couldn't drop below a certain level of carbs without running into issues. Those issues may be brought out during stress.