Thanks for your query.
If you have been using the birth control pills meticulously for so long, they should confer protection against pregnancy
, even without the condom.
Sometimes, it is common to have a delay of a few days , even while on birth control.
Just to be sure, please take a home urine pregnancy test if you do not have your period within the next 5 days.
ALso, using a condom is great idea because it provides double back up against pregnancy, and also protects against sexually transmitted diseases and other pelvic infections.
Please do not panic
I think with regular birth control use, chances of pregnancy are pretty slim.