Has anyone had any experience of this pill? I am currently on the 6th packet and things seem very up and down. The first 3 months a normal "bleed" of 4 days. Then a month where I had light bleeding ( including normal 4 day "period" ) for almost 16 days then last month the 4 days were so light it was almost none existent. I would have thought by 6 months things would have been more settled?