Is there a risk of pregnancy if I regularly use birth control pills and condoms?

She has been using birth control pills for two years very regularly and always at the same time. Last night I felt that I was a little sick and at night it was even worse, I thought I could not do it and would vomit but I drank some water, stood by the window and then I managed to fall asleep. I would like to add that in addition to tablets, we always use condoms. Is there any risk or could my well-being be due to something else?