Pregnancy After Using Triphasil

Patient: I am 41 years old and have been on triphasil for about 17 years. I dont know how it happened but when i started taking my new pack of pills Dec, i started in the middle of the pack and only realized this half way through, i stopped taking that pack and i did get a bit of a period on the 9th of Jan for about 4 days, which was a week earlier than i should have got it. I never started a new pack then as i waited to see if i got my period on my regular day the following week, 17 Jan, that never happened. I have not started taking my new pack yet as i am waiting to get my period to start it. Is there a chance that i could have fallen pregnant in that time?

Doctor: