Should White And Pink Pills Of Femoston Be Swapped Every Second Week?

Hi, I have been taking femoston now for two years, I have regular check ups with my doctor, she now wants me to start taking them every two days, my tablets are white and pink, I am a bit confused as to how to take them, do I take the full course of white and pink, as I will now have a two month supply, in others words, will I be taking the pink for a full month and the white for a full month, or should I swap from pink to white every two weeks,