Is there a chance?

Kayla • Recently married, 2 beautiful girls and 1 on the way!
I have been having 26 day cycles..I ovulated late on cd16...was suppose to start my period yesterday...no show! But negative pregnancy test this morning...could I still be pregnant and it just be implanting and not enough to show? Or what is it... I've been cramping like AF since ovulation...and my boobs are seeming to get a little sore...what do you think?