Your 'Dom' is essentially the very same person that you have been involved with prior to entering a new dimension in your relationship.

Inconsideration and lack of empathy are traits that would be obvious or should have been obvious prior to entering this aspect of your relationship, usually a person's general traits are a fair indicator of what type of a person they will be regardless of whether they select to be dominant, submissive etc. These are baseline traits. Have you thought about the way he treats people in general outside of your intimate moments? Are there other indicators outside of your sexual relationship that bug you or are there aspects - which you now see as 'small' - that are in fact related to inconsiderate behaviour?

Does he 'insist' on other more everday aspects in your relationship, like an two year old toddler?

Yes it's difficult to put one's foot down, make a stand or end a relationship (if it comes to that road), however if something bothers you this much, you have expressed it and in addition to this you have had a physiological reaction to something and this guy still can't get it then that's a fair signal.

Your health, your livelihood are important aspects of your daily life and your self esteem, submissiveness does not mean that you 'ought' to do something that will put you in a situation that risks these two aspects.