I am on the birth control patch (much like the pill). It is applied weekly for 3weeks, I take it off and the 4th week I get my period. I didnt replace my patch for week 3, and 3 days later I had my period. Before all of this mishap occured my period was due June 29th, however it came 9 days early due to me not replacing my patch. I had sex June 5th, the day after my period ended while I was on birth control and we also used condoms. My question is, what are my chances of pregnancy? Did I ovulate earlier, or later or at all due to the birth control? Plesse help me understand.