Is it common to get a period so quickly when starting metformin?

When starting new birth control pills after a break, when am I supposed to get my period?

• I had to stop taking my birth control pills for about two months. I just got back on them two days ago. I'm supposed to get my period in about two weeks, but now that I started my new pack of pills, will I still get my period in two weeks, or will it come when I take the last row of my birth control pills like it usually does when you're on the pill?

• Answer:

  Well you may have messed up your cycle. You are not supposed to start your new pills until you get your period... depending on the type you either start them the day you start your period or the Sunday after you start. So you probably won't get it until you are taking the last row of your pills, but you may have some spotting when you were originally supposed to have it.