Hi Vivianne.
It sounds to me like you made the right decision by breaking up with him. If you asked him to stop, and he didn't, that is not the kind of person you want to be with, ever. Your instincts about how that relationship would turn out are right.
Also, I think it's normal how you feel about what your parents/mom might think if they knew, but you are an adult and it is really none of their business. But again I do see how that would be a concern and something you might feel guilt and shame about.
In all of this, I think it's important to remember that you did not ask for this. It is not your fault. And it might take awhile to heal from it, possibly even a long while, and that is okay too. Trust your body. It will let you know what is right, and what is not.
I am really sorry this happened to you, and I wish you strength and healing. You are in my thoughts.