Have you continued to take your pills in the right order every day? Why do you think you're pregnant?
If the only reason you think you're pregnant is because of the strange bleeding, that is NOT an indication that you are pregnant. Sometimes that just happens on the pill.
If you have been taking your pills incorrectly, then you may be pregnant, but bleeding is NOT a sign that the pill isn't working.
The pill will not harm the fetus if you are pregnant.