Extending cycles with the pill to this extent can often lead to breakthrough bleeding, which may well render a woman niddah. Additionally, any changes in pill taking should be discussed with a physician.

In your case, if you wiped yourself with tissues or toilet paper after at least fifteen seconds had elapsed from withdrawal, then what you found could be disregarded as a stain on a surface that does not render women niddah. See our pages on stains and toilet paper for more details.

If you found the stains on a white cloth, then your status depends on the exact shade of brown. Dark browns sometimes do render a woman niddah, although a halachic authority could evaluate the stain and might be lenient.

If you found the stains within fifteen seconds after intercourse, on any type of surface, a halachic authority should definitely be consulted as there is a particular concern about blood found after relations.