Again, just thoughts, to kick around ... .
Unwind, you sound as though you feel violated by this experience, at the level of body and psyche. Unsurprisingly. When I say "sound" and "feel" I don't mean this isn't real, or justified, I simply mean it's at the "top" of what you say, coming through "first", and so it suggests it is important.
I wonder if it is the violation that is significant? It might lead to a desire to "close up", to make yourself invulnerable, un-hurtable, not having to rely on others, inviolable.
Part of being human is being able to not only trust ourselves, but to accept that we need, and must accept, help from others. It's a very deep thing. For many of us, it is an extra challenge when something has happened to us to make us wary of this very basic human need and dynamic.
Some of us have been vulnerable at some point, and, instead of help, and aid, we have had the misfortune to have that trust violated, and our vulnerability exploited in some way, or the "help" proffered not be help at all. It is then very difficult, but very necessary, to learn to be open towards others, and to trust, again. But it is not an easy process at all.
And part of that leaning to be open towards others is based in an acceptance that others are equally vulnerable, limited, and needing of support at times. That, really, is what being fully adult and human is about. I don't mean that in any trivial way. It is really, really hard.
I think it takes time and help to get there if you have been through an awful experience.
If you do go for further counselling, as an individual, as a couple, can I just suggest asking very carefully about the form of counselling. For example, Relate tend to do a lot of CBT-style counselling, which I don't think would be helpful.