What are these pains 😣

I’m not due af till the 12 of December But for the last 3 days I’ve had the worst like period cramps ever at first I thought it was ovulation pain but I looked up that ovulation pain only last a couple of hours to a day this has been going on 3 days and they feel the same as period I ovulated from the 27th to 30th well they were my peak days... anyone else had this ? What could it be? X