Your biggest problem is anxiety. Getting caught on an increase in head ache or fatigue is unreasonable. If you get a head ache, take a break. If you get tired, take a break. Think of it as a momentary clue to take a break.

If you are going to take on a busy activity, expect you MAY need to take a break afterward.

Get used to the fact that you may have relapses from time to time. As your life goes on, you will begin to learn how much stress you can tolerate. You may be able to tolerate a high level of stress in certain areas and less stress in other ways.

So, the head ache or tiredness is not saying you should not be coaching. It is saying you need to take a break.