Should I apologise to an avoidant ex who broke up with me?

For context, my ex (23f) broke up with me (26m) about 10 weeks ago. Our last conversation was 7 weeks ago. We had break up sex and she almost gave me herpes (lol). I knew she had this from the very beginning, but for some reason the last time we had sex I developed symptoms. I am still not in the clear but testing at w10 is negative. I was fully freaking out about this and I texted, called her multiple times and sent a long message which I think came across as a little hurtful. After that she blocked me.

Is sending a simple message apologising and saying I shouldn’t have involved her appropriate? Not sure what to do or what it conveys. And I also don’t know what will help me in the long run. Part of me wants to retain the “fuck you” attitude but I also want peace and not sure how to proceed