I too sometimes have a grueling schedule. But then sometimes I just take a day or an afternoon off. Like today!
Balance. I'm trying to teach myself better to have balance in my life. Too much work makes me cranky as it does anyone.
Fender, one of the things I did after the D was to make myself a list of the things that are most important to me in relationships. Maybe you should write yours down too. High on my list are:
Be certain the person you're having an R with is truthful/honest and give them the same back
Don't take blame for things you don't do, but take blame graciously for the things you are responsible for within 24 hours.
So maybe you should give her 24 hours and see if she gives you a head up on what was really wrong.
