My Best Friend Had A Guy Cum On Her Vagina

My best Friend had a guy cum on her vagina and then finger her 12 days ago. Last Friday she started having cramps that she thought were her menstrual cramps. But she hasn't bled yet and is still having cramps. She's worried she's pregnant. We have googled and know there's a chance. But she also has PCOS. My question is if she was pregnant would she even be showing pregnancy symptoms this early? Like before the 2 weeks. And just how likely is pregnancy via fingering? I understand that sperm have a long way to travel and thus is why they need the ejaculation. Thank you for your help