It might not hurt to ask. They put me on it b/c there were months that I would start the brown spotting the day after I ovulated! Other months I would spot brown at least a week before AF actually showed up. I guess that can be caused from low progesterone, which can cause you to have chemical pregnancies. Since I started taking it, if I have any brown spotting, it's no more than a day and a half before AF officially arrives.