Hello.
No one can tell what's going on without a physical evaluation; however, I'm sure a gynecologist can tell you possible causes. At various points in their lives, many women experience mid-cycle pain during ovulation, and it doesn't necessarily indicate any problem.
However, this forum is for advice regarding sexual and relationship issues. I suggest you ask your question in the gynecology expert forum at:
http://www.medhelp.org/forums/show/103