Generally around day 10 ovulation can occur, or for some it may take a few cycles. Everyone is different. It's kind of a 50/50 chance. Just keep track of dates, such as when you stopped the pill, when you were bleeding and the flow etc., that way if you end up pregnant, you can give the dates to your doctor to help determine when you got pregnant, to find out how far along you could be.
Best of luck, Hope this helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *Accept* button.