What do I do?

So a girl I was dating, who I just broke up with, gave me the clap, I found out right after I broke up with her, I told her and she said how can I accuse her of that blah blah blah, but she was the only person I was with in 7 years, do I just le this go? I would like to message her and let her know how she hurt me and I don't want to go to how disgusted I am, but I do