Originally Posted by
atomic sagebrush
Your chart was a bit strange, is there any way you might have ovulated later??
Some people, myself included, have noticed cramping around the secondary estrogen surge. You are describing something that sounds fairly strong, though, which makes me think that it was either O or...
Another possibility is that you have a cyst. This happens and can be quite painful, but usually resolves on its own and doesn't stop u from ovulating in the future.
What many people are afraid of, but that this probably ISN'T, is a chemical. That cramping you're describing would be too early to be related to a chemical, and it's unusual to notice cramps even 7-9 DPO, because it usually takes a little time before your body kicks the "I'm pregnant" vibes into high gear!