PREGNANCY AFTR IPILL WITHDRWL BLEEDING?

Hi Doctors , My Girlfriend's periods started on 2 Oct 2021 and the last day of period was 8 Oct 2021(very light bleeding), I deep fingered her on 8 Oct 2021 with possibly sperm on fingers and as precaution she took unwanted 72 within 6hours, then on 9 Oct2021 we had protected sex and she took unwanted 72 within 10 hours after 1 week on 14oct 2021 she saw some brown spotting on her underwear, then on next day (15oct2021)withdrawl bleeding started with some days of light and some days of heavy blood flow and with minor cramps sometimes, but the bleeding and cramps totally stopped on 20 Oct 2021,we did a home urinary pregnancy test on 11nov2021, it was negative ,then we had protected sex on 11nov2021 and she took unwanted 72 again , after taking the pill she experienced some cramps and then the next day a little bit more intense cramps , now it's 18 Nov and there is no withdrawal bleeding ... What to do , is she pregnant ..??please help ...