I'm sorry that question title is so long winded! To explain, the Torah says the woman is in the state of niddah for 7 days once she starts her period. The custom today is to add another 7 days before the woman can become clean in the Mikveh. The Torah also says if the period lasts beyond the normal length of her period, then throughout the time she is having an unclean discharge she will be as if she's in niddah. However, what if the woman's period is naturally longer than 7 days?
If one's period has lasted for 8 days since her body got on a regular cycle. It is not an extra day, it isn't abnormal bleeding. She just typically still notices blood- just a little bit, but it's still blood- 8 days after her cycle starts.
If a woman's normal period is longer than 7 days, do the days after day 7 count as the monthly niddah, or extra uncleanness? And just to be clear, how does the woman count the 7 days after her period if the period normally goes longer than 7 days?
Thank you! :) I'm new at this, so I apologize if this is a dumb question. Just trying to learn!