Just got off birth control....

Very new to this ttc thing. Getting married on October 11th. Got off the pill September 11th. Scheduled period was September 22. It came September 16, 17, and 18. We are officily trying. When would I actually be able to count a real cycle? How soon after birth control? Should I wait a few cycles before I even attempt to track anything? Any advice would be appreciated! Thanks!