So I was at this highschool party this Friday, had a lot of fun, but whatever, that's irrelevant

As most parties I'm just having fun with friends, moving around the dancefloor and moving on any girls giving obvious signals. One of the girls I got things going with said something weird

I run into her on the dancefloor, her eyes obviously show interest. We make out and I bring her outside to be just me and her. While making out with my hands in her crotch giving her a pussy massage she says "if you want to have sex tonight, you should find another girl"

Didn't bother me, but really fucking odd statement, considering that we kept making out after she said that, clearly her words didn't match her actions. I tell her "it doesn't have to be today" and she goes "right as if you'll remember me after this" She also says I probably won't have any trouble finding another girl, which confuses me even more since that obviously entails she's attracted of me (she even directly said so). So what was going on here? I assume she was on her period