Reading Naomi Watts’ book…

Anyone else? I’m confused about what she says about HRT continuous vs. cyclical. She says continuous HRT is prescribed for women who have been without a period for a year or more. Otherwise, it’s cyclical. Well, I’m still getting periods (erratically) and I’m on continuous HRT. I’m 48. My doctor said I could do either continuous or cyclical. But I have no idea when my period is due because it’s all over the place. Help?! Why is this so hard???