I am not exactly sure when the first day of my last period was. i want to say the 22-23 of sept. 2007. i had sex oct. 3 pretty late at night... maybe even the am hours. then i had sex again oct 5 into the am hrs of oct 6. my period stopped the 27 of sept. i was using the ring for a few months prior so i am not sure on the exact number or days in my cycle.... at some point i woudl take it out at the end of the month and then put another in after my prd. i am pregnant and would just like to see if anyone has any ideas when i could have gotten pregnant... which date exactly.