@Humble2019,
Of course you're not overreacting.
Unless other arrangements are made, marriage comes with sexual fidelity -- and that includes not doing escorts. So unless your marriage is an open one, then you have every right to expect your husband to not stick it into unfamiliar women.
And even if, for sake of argument you were in an open marriage, then he's still being insensitive at best. He's dismissing your feelings and your opinion.
People who love each other listen when they're told they're hurting the other person, and they take steps to diminish that hurt and prevent it from happening again, because they love the other person and don't want to cause them any pain. They don't dismiss the other person's pain.
If he won't go to counseling, you can always go alone. Talk to an impartial professional and maybe start to formulate an exit plan from your marriage.