Cramps

I'm in need of some advice/input...I've had cramps for the past 3 days. Not normal, squeezing of the uterus period cramps, but a brief, sharp pinching pain in the same spot at the bottom of my stomach (presumably where the uterus is) off and on for the past 3 days. I've never felt anything like it before. AF isn't due until the 17th and I usually only cramp the day before and it's normal period-like cramps. I'm not sure how many dpo I am as we just tried "going with the flow" and "not thinking about it" so much this month. My guess would be that it was around 9 days ago on December 2nd and the cramping started on the 9th. My husband and I are ttc #1 and really haven't told anyone so I'm reaching out on here. Thanks!