You will not know until you take the test, obviously. I can only repeat what has been said.
To speak on my experience, in the time I've been using birth control pills over the course of about eight years now, I have had no issue. I have also always allowed my partner to ejaculate inside of me.
But perhaps I have just been really lucky. I personally believe that, if used as directed without fail, you do not have to worry.
I have skipped periods by switching pills and such, or starting again after brief spans without, and it's highly possible. Could you be pregnant? Even if you had been using the pill for months without missing a day, you have a small chance regardless.
Again, you will only know with a test. I wouldn't advise continuing to idle and wait for replies here that will repeat this.
I may be slipping into a pretty moody or cold mindset, but I'm getting unnerved by the number of "am I pregnant" threads and "medical advice" threads I am seeing here; we're not doctors here. Anyone who reads this, please, if you have medically-related concerns that fall in the realm of injury, pregnancy, medication concerns - consult a professional immediately.