So if you are on Birth control ..and ur not taking it for a week (7 days)… and your period hasn’t started…but it may start any minute…would you pray during those 7 days…or should you?..
keep praying until it starts...simple. no need to stop your namaz until there is actually cause for you to stop.
Wouldn't you get the "feeling" like cramps, abdominal pain? You shud keep praying till you actually begin =)