# Even if she saw blood and didn't have a hargasha she is a Niddah rabbinically.<ref>Shulchan Aruch 190:1</ref>
# Nowadays most women do not feel any of these conditions. Nonetheless, the poskim assume that women who experience their period are a Niddah on a Biblical level.
# Either way the rules of ketamim do not apply to a bedika cloth or any blood that is certainly from the uterus.
==Feelings that are Confused with a Hargasha==
# There are certain phenomenon that can cause a sensation similar to a hargasha. Therefore, if a woman was involved in any one of these activities and then saw blood that could have been emitted from her body it could be that she is a Niddah Biblically and that blood is not considered a ketem.<ref>Gemara Niddah 57b, Sidrei Tahara 183:1</ref>