If a woman treats the blood she saw during certain days as Hayz and did not perform her acts of worship and comes to know later that it was not Hayz, she should give Qadha of the lapsed prayers, and fasts, which she left out. And if she perform acts of worship under the impression that the blood is not Hayz but realises later it was Hayz, then the fasts kept in those days will be void and therefore she should give Qadha of those fasts.