When Should Oralcon Be Stopped When Trying To Get Pregnant?

Hello, I ve been using oralcon for 3years. I took it everyday at the same time. During the 3years I stopped using the pill for a month I then had unprotected sex during this time as a result my period was late and I thought I was pregnant. But there was no pregnancy. How long do I need to stop using the pill before I can be pregnant?