Hi I recently started taking metformin for pcos. Before I started taking it I dident have a period for 1year so my doctor put me on progesterone well I took it and I finally started a period it lasted 7 days it ended last week.I woke up this mourning and was bleeding again has this happin to anyone else should I be really concern about it? Is it normal? Does it have anything to do with the metformin?