I need advice on this supposed unicorn i thought I found

I met a hb9 a few weeks ago, had three dates in a row and then slept with her multiple times. She seemed sweet, honest and innocent - definitely had ltr potential. So far so good.

I ask her whether she wants to be exclusive and she says no because she "just got out of a relationship". Note -we don't have sex after this at all.

A few days after this I invite her to to mine after her work finishes and she says she's too tired for sex. I asked her to leave in a round about way because fuck being friends... and she later sends me a long text about how its not me its her, basically implying her past with her previous boyfriend was to blame. Some background on this girl, early 20s, 3 sexual partners. She was with her first boyfriend for like 4 years, and apparently was blackmailed into seeing him for the last two. I waited for like a week to talk to her and shes gone back to her hometown for the weekend, where her boyfriend lives. This alone didn't make me paranoid, but I'm getting weird vibes from our chat I made a sex joke and she said that I had sex on my mind too much... I jokingly called her a slut shamer , which she mistakenly assumed meant slut .."because I have a low opinion of myself" (her words). I make another joke at her expense saying she was the "lowest of the low" and she takes it personally again, saying she has a lot on her mind at the moment.

This is weird in the context of our dynamic, usually shed reply with some form of banter. She said she didn't want to talk about it.

So heres the deal, I think she's fucked someone else and it shouldn't matter as I have too and we agreed to not be exclusive. but it does.. How do I find out whether she's fucked her ex or some other guy without seeming like I'm hyper paranoid?

I invited her out yesterday for friendly drinks so I could guage whether she could be plated but I don't want to share her... but at the same time I don't want to seem too invested by engaging in such heavy talk the first time I willve seen her in about a week and a half. Wat do??