Hi, I ve been on birth control for the last two years and have never had any problems with it. Since I switched to continual use I ve been having irregular periods with random spotting which I know is normal but this last month my period came a week and a half early while I was still taking the active pills. The period lasted like normal but when it normally would have stopped, it just got lighter and I have been lightly bleeding for the last two weeks. It started on the 23rd of January. What could have caused this?