Confused, am i ovulating? help please

Yadi • Married since May/2011, Now mother of a beautiful baby boy!
Today is my CD 14, i've been cramping yesterday and today, i checked CM and is optimal (clear, wet and very stretchy) but i did opk this morning and it doesnt seems to be positive for Lh surge (my last cycle i had a very clear darker test line) so i am very confused :( am i ovulating or not? Help please.