4 days late

Becca
I don't even know What's going on but I'm getting discouraged. I lost an ovary a couple of months ago due to a cyst and my doctor told me to try sooner than later just in case. We decided to stop birth control and let whatever happen happen. It's been 4 months of not trying but not preventing. I am now 4 days late with so sign of AF showing up. I have checked cervix and it's still high. I'm starting to think I may have just not ovulated this month. Anyone get a later positive or is it too late and it would have show up by now? If I'm not pregnant we are going to officially try in February but I really hope this month was our month.