Because of these helpful replies, I was able to break up with her today. Otherwise I might have had to help her with the morning after pills, which I doubt she bought. From what I learned, she's about to ovulate any day now and I can't be anywhere near her.
To answer the "how that can be done" question, she said she got some sperm on her hand. She told me she believed sperm could be alive for 2 days.
I came across this and had to comment. Sounds like you hooked up with a bit of a crazy person. I agree that the chances of this being successful are pretty low, unless she has a shorter then average cycle. I doubt you have much to worry about. What a crazy story.
If her period started on May 31, and she's only on cycle day 8 today, chances are very low that she would get pregnant—even with regular intercourse. And a couple of days ago would definitely not be considered a "peak day to get pregnant," as that would have only been cycle day 6 then. As for inseminating herself after oral sex, I'm not even sure how that can be done....unless there was a condom involved to collect the sperm. So all in all, I would say the chances of her getting pregnant from the self-insamination is VERY low.
I do know she started menstruating on 5/31, and that lasted at least 2 days. So I spent about 8 days with her. I don't know what that says about her chances of getting pregnant.