Hello, thanks for using health care magic Irregular in take of contraceptive pills is the number one reason for failure when using contraceptive pills. Pills are hormone based and irregular intake creates hormone disequilibrium that could account for the irregularities in your menses. It is also possible that the irregularity is due to a pregnancy. However, only a pregnancy test with early morning urine taken after the expected date of menses could clarify if there is a pregnancy or not. If the pregnancy is already there, it will be unfortunate for you because it can not be postponed. Pregnancy can only be postponed by effective use of contraceptive you have not been using effectively. Hope this helps you. Best regards Dr Achuo