On Oct. 11th i went to go get the plan B pill and i had a period the week of the 18th and the doctors gave me Birth control pills but didnt explain how to take them. ( it was a small womens clinic) and so i didnt take them becuase i dont know how besides the fact that i take them oraly. So i finally read the paper in the inside of the box and it said i should start the 1st sunday of my period. I have very irregular periods and they can be missed for up to 3months plus. So my question is how do i start taking the pills if i dont have a reliable period. If any one can help it would be great.