"i like this pill because it is a progesterone only pill. i don&#039;t like the idea of adding estrogen. however my biggest complaint is that i have irregular periods. sometimes i have two periods a month. i like everything about it otherwise, no other side effects. i am unsure of what to do because i am tired of having two periods a month. i did have times in the past where i had a period every other month. so i am not sure why it keeps changing."