Thanks for your query.
With regular use of the birth control, chances of pregnancy
are very remote.
Please check for a pregnancy with your home pregnancy test so you can be sure.
Also, with 3 monthly pills, it is very common to have delayed periods or scanty menstrual bleeding.
do not worry about this.
Continue taking the pills as prescribed.
Do not miss a dose.
Check for pregnancy.
have regular follow up visits with your health care provider.