That's never happened before....

So, I'm 14 days late on my period. But no abnormal symptoms either. (No cramps, sensitive breasts...) And I did a CM check earlier because I felt like I may have started my period, but found pre-ovulation goo. That would make it two ovulations since the last time I had a period. I'm not on birth control, not trying to get pregnant, live a healthy life and recently got into a stress free relationship. We have unprotected sex, and use the withdrawal method. Any thoughts?