cramping after orgasm period or pregnant?

I've read a lot about this being a symptom of early pregnancy, but can't find anything about it being a symptom of an impending period which is giving me a lot of (hopefully not false) hope! I've never experienced this before a period, and I noticed it yesterday at first which was 9DPO and again today at 10DPO. I've also had normal cramps but these started on 5dpo are slightly different. My period is due on Saturday, 14DPO. Has anyone else experienced this? Either resulting in a BFP or a BFN? :)