Really intense stress that would make your adrenaline go, like a cardio work out, you might need an extra packet the same as you would for an aerobic session.

That is what I did for a situation; and when I went over it with my coach she agreed that I had done the right thing.

Awesome for taking the day off to care for you!
I was going to suggest sugarless gum for when you feel like cheating. This works for me, and I can't even believe that I consider sugarless gum a cheat (that's how much this program is changing my eating habits and beliefs). Even Dr. Oz suggests sugarless gum for stress and alertness.
Anyway, taking the day off from work was the very best idea! I love it. I may have to do the same next week.