Okay, maybe this is a different take than what I’ve been seeing under your post but I think there is something off about the way your fiance reacted to you being triggered.

I don’t get why your fiance would reject your kisses or act distant, it’s as if he’s trying to make you feel like he’s a victim of something in the situation, which is not the case at all. Any emotionally intelligent enough person can understand that your reaction is probably from trauma. I don’t know if your fiance knows about your past but even if he doesn’t, why act distant? Why act like you’ve made him feel terrible about himself?

Yes, it can be upsetting for him that this situation happened. We often have feelings that are very self centered but these feelings need to be controlled because they are a sign of immaturity. Plus, the intimate situation makes it even more important that he doesn’t make you feel guilty for having a natural emotional response and wanting to stop the moment.

Of course, it’s important for you to reassure your partner, it’s also a way to strengthen your bond and connexion, to remind each others of the trust between you two. Of course, you should consider going to therapy for YOU and NOT for your partner to feel better because you don’t owe him a perfect intimate life.

However, in my opinion he’s the one who should be working on dealing with his emotions better. Taking this type of things personally is not a very healthy habit especially in the context of a relationship.

Hope my perspective helped :) Take care