CD9 is very, very early for ovulation. Even if you did O then, it takes 7-10 days to implant so you wouldn't be implanting until CD16 at the very earliest.

I think Samantha might be right about it being ovulation, some women (me included on certain cycles) have ovulation pain which is like a cramping feeling.

If you have any question in your mind about possibly having a m/c on your last cy, I would encourage you to see a doctor. Sometimes after miscarriages you need a D&C because there are some remaining "debri" (for lack of a better word which will cause you problems down the road.

__________________