I have been on lo estrin 24 fe for 2 years, i recently missed 12 days worth of my birth control because i lost them. I waited to get my period, which i did a couple days later. I got my period on a monday december 29th it lasted till early wednesday morning december 31st . I then had unprotected sex that following sunday january 4th, Is there a huge possibility that i can be pregant?? please help