Hello, I would be happy to help you.
Even though you are on birth control pills, and even though you seem to be getting a normal withdrawl bleed on the pill, the fact remains that birth conrol is not 100%. You must take a pregnancy
test to be sure.
If the test is negative, this could be related to your bowels or an enlarged ovarian cyst
. Whether the pregnancy test is positive or negative, you should schedule a visit to see your OB/GYN to check it out!
I hope this helps.