How bad are the cramps?

Amethyst • Still trying! 3yrs+ • 12.5.15 ❤️ • ♒️
My period is 10 days late, I had unprotected just after ovulation dates but I don't even know if I ovulated or not, I never get it late, an my cramps the last few days have been so bad that I could swear I'd get my period the next day but nothing! , what does it mean?