Hi I'm 29 years old I have 4 boys. For the last 3 my peroids are not right I'm on bith contol bot this not the first time I have been on them I have to my dr. They just say its my bith contlo I soppter a week before I srart and then don't have it at all or I have for 1 or3 days not me. I took a test and it said no.