I think I’m being blackmailed

This is embarrassing and I don’t know what to do.

I go to a pretty small college. There’s this girl “Ashley” who has always come off as kind of a pick-me. Despite being weirded out/annoyed at times, I’ve tried to remain friendly with her while also keeping some distance.

About two weeks ago it was brought to my attention that she was talking to some of her friends and I got brought up, specifically, the fact that I’m circumcised. While I don’t advertise that fact, I’m Jewish, so I guess it’s fair to assume.

According to what I was told, Ashley was saying she wants to get with me because she likes circumcised guys. I really wasn’t comfortable with this, partly because I have a history of unwanted sexual encounters. After verifying with someone else who heard the conversation in question and shared they heard her talking about it even before then, I stupidly approached Ashley.

Calmly, I told her I was made aware of the discussion, and I said I would prefer if people didn’t talk about me like that. Then, like an idiot, I said, “That would be like me saying I want to hookup with you just because the size of your breasts” and explained why I thought that wouldn't be okay. She said she'd be upset if someone said that about her, too.

I thought the conversation went well and was under the impression she agreed to not talk about me like that anymore, or at least not openly for a bunch of other people to hear. But yesterday I received a message from her. Turns out she had her phone down by her leg when we talked, and she was recording. The clip she sent me was JUST that statement I made, without any other context.

She hasn’t threatened or demanded anything, and I haven’t responded, because frankly, I don’t know how, but I’ve been really stressed about it for two days. Help? Advice?