Ovulation Question?

Shelby • 21. Married to the love of my life. TTC for 3 years.
So my period is 12 days late. I am about to be in what is supposed to be my fertile window. But since I didn't have a period, I can't ovulate.. Right? Or am I wrong?
And no, i don't think i'm pregnant because i have taken 6 tests the past week and all were negative. Apparently I just skipped a period....