Hello, and i hope I can help you today.
The effectiveness of birth control is reduced if you miss pills, and your period may also come at the wrong time if you have not had a consistent level of birth control in your system. It is recommended that you use a backup method of birth control (like a condom) if you miss more than one pill in a pack, even if you double them up.
So, if you truly are late (on your pill-free week at least a few days) and have not started to menstruate) you can perform an over the counter urine
pregnancy test. It it just as accurate as the doctor's office. If you are not pregnant, then start your new pack of pills on time, and if you can better adhere to taking the pill at the same time every day, your period should come more regularly.
If you have trouble remembering to take pills, there are other birth control methods that are long acting and effective like the birth control patch, vaginal ring, or implantable contraceptives that you may want to discuss with your doctor.
I hope I was able to answer your question today, and that my advice is helpful.
Best wishes,
Dr. Brown