Late period

So my period is 3 days late and I’m cramping but like it hurts super bad for like 5 seconds then it goes away. I’m spotting I think. In my panty liner there’s a little pinkish brownish color but when I wipe there’s nothing. Im super moody ?? Is there a big chance I’m pregnant ?? I had unprotected sex on the 8th and I ovulated on the 10th.