I am wondering, for people who have had major setbacks while recovering, do you know immediately you have gone too far when you overstimulate?

I realize this is annoying but I had a 6 minute conversation this morning that left me pretty exhausted. It's longer than I've been able to talk to anyone since I got hit. Was with my doctor.

But, I am trying to settle the anxiety and understand... for most people - when you exert way too much to cause a major setback... is there a brutal headache that follows? In the past that is how I knew I was back in a hole.

I am able to type which is a huge bonus. And videos have not been a problem today. But, into day 5 after the hit... just want to make sure I take the right precautions and tread carefully...