Hi,
Thanks for the query.
While using
contraceptive pills side effects like menstrual irregularities can occur.
Some women may have
hypomenorrhea,
oligomenorrhea etc.
Some women may have absence of periods also.
For more details : http://srsree.blogspot.in/2013/11/general-guidelines-of-using-combined . tel
If you used the pills as per the guidelines, the possibility of pregnancy is less.
Go for
blood test for pregnancy test once.
If the test comes negative, the possibility of pregnancy is less.
You can continue with your tablets.
Take care.