I am 6 weeks pregnant and i am periodically bleeding my mother had the same thing happen during the firsy 3 months of her 3 pregnancys also could this be hereditary ?

This is not heredita: The 2 likely possibilities are what is called implantation bleeding, which comes when the embryo is growing into the wall of the uterus, which is common. This kind of bleeding will stop on its own. The other type of bleeding can come if you are possibly having a miscarriage. It that were to happen the bleeding would become more like your usual period, and possibly heavier.