I figure if you ovulate round day 14 that is when you would get the cramps, i used to have cramps at ovulation (when i had af) and that is how i knew i was ovulating, it may be usefull to take your morning temps and see when you ovulate and pin point the cramps to this or use the opk's. Hope this is of help, i would have sent a message to you sooner if i had seen the origional question.
We are all here to help so please dont think we have ignored you, it could just be that none of us knew the answer.
Good luck with ttc and hopefully you will return and ask us more questions
sprinklings of baby dust to you.