What are the chances of becoming pregnant on birth control?

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I just had a baby in may and decided to breast feed. Because i am breast feeding i have to be on a low hormone birth control pill. ( its the camilla) But anyways i had a period last month it was a week early, very light, and lasted 3 days. This month i am now 4 days late. Could i be pregnant? I take the pill everyday but sometimes not on time. Has this happend to anyone else?

You can get pregnant while on birth control, but the chance with the pill are very small. Between the pill and breast feeding, you may not get a period at all. Wait another week, then take a pregnancy test, but I would bet that you are not pregnant.
not the same thing but me and 2 of my brothers were conceived when our mother was on the pill
If you take it correctly, (which you haven’t) it’s 98% effective.
I would take a pregnancy test just to make sure,
but I heard that beast feeding can throw off your cycle a bit.
The rates of pregnancy vary greatly depending on what type of birth control you use and how well you use (or how regularly you take) your birth control.