First of all, I would like to say that you have enough of a realization of what's going on than you give yourself credit for.

You aware that the whole pleasure/guilt thing is very much ingrained in you. And you now have the knowledge that, for you, orgasm BY ANY MEANS is resulting in the same reaction for you (albeit to varying degrees).

Are you a bad person for considering this? Absolutely not.

Should you have never done this? Only you and your therapist know what the "right" step is for you. I think you did something that you knew might have terrifying consequences for you....but you did it anyway. And you did it in the most careful, responsible way possible. So, in my honest opinion, you thought it was the right time.

Whether or not you do it again will be your own decision and it will be the right decision for you. Because you have things well under control.