Someone Please Help Me Figure This Out!

Brittnay
I got off BC in December and had my first period in March. I've had two more periods since then all 23 days apart. After my last period I tried using opk to track ovulation and found that I ovulated on CD20 so I knew that my cycle was going to be a little off this time. But it is now CD35 and no af. I took two pregnancy tests and they were both negative. There is not even a sign of af coming! I'm so confused. What happens if I don't get my period? Will I ovulate again without getting a period? I've heard it is possible to ovulate without a period but idk if it can happen in this circumstance. Anyone have this happen? Any advise would be great! HELP!