Since the birth control pills are not 100% effective, pregnancy may occur, and it is also possible to have lighter periods for a first couple months during pregnancy. To be sure you may take a home pregnancy test or see your doctor for a blood pregnancy test for more accurate results and confirmation. However lighter periods than the usual may also occur with some other reasons like stress, anemia, improper diet, extreme exercise, weight loss etc.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.