Perhaps your Dom is just as stressed out as you are, and sex is his way of relieving stress? That is kind of the way I am sometimes... I will get so stressed I stop worrying about Wellbehaved's needs and desires and get angry when he's not feeling up to it.

I also just wanted to agree that sensitivity is a very important quality in a good Dom/me, and in trying to be sensitive in that area often makes it very easy to slip into being oversensitive to others words and actions. Your Dom probably just needs a little time.