We understand that it is upon a lady to decide when
she is having her menstrual periods and when she is facing any other medical
problem. If a lady is positive about the fact that the spots she has observed in
fact indicate the beginning of the cycle she should stop praying. Generally, it
is not difficult for women to discern the nature of the bloodspot(s). Even if
one is wrong in one’s decision it would not be sin. We are only required to
honestly use our reasoning power and reach a conclusion and if we err, we will
not be held accountable.
However, if ladies who experience such problems are in doubt,
they should consult their doctor. You ask whether one should stop praying when
one experiences premenstrual cramps. I understand that since it is the bleeding,
which marks the beginning and end of the cycle therefore one should rely on such
bleeding only and not cramps. Since women experience the phenomenon
continuously, they should come to a positive conclusion regarding which spots
relate to which kind of bleeding.