What should I do if there was abundant spotting with the 12th tablet?

I think it is about the contraceptive pills Atyvia, not "Aktivia". If so, please read on. When you are taking Atyvia in the first few months, you may experience irregular bleeding from the genital tract (spotting or mid-cycle bleeding). It is recommended to continue taking the tablets. Irregular bleeding from the genital tract usually disappears after 3 cycles of use of Atywia. If bleeding persists, becomes heavy or recurs, you should report it to your doctor. Your treatment - for example, contact with a gynecologist - should therefore depend on the intensity, continuity and extent of the mid-cycle bleeding. I enclose a material that further explains this: