Period late?

❄️samantha💕

My period is late by ten days(it didn’t come this month and that’s never happened the 8 years I’ve had a period) so I took two tests they were negative,with movement (like stretching or bending over a certain way) I get this excruciating stabbing pain right in the middle of my uterus that will last up too a minute or two after the movement I make,is this cramps or a sighn my period could be coming?