The sugar pills are there to get you in the habit of regularly taking pills, you take these instead of four weeks of hormone pills because the lack of hormones gives you a period-type bleeding. Just take the next cycle of pills on time and you should be fine.

It is completely normal to have your period at that time. I have been on birth control pills for 4 years. My period starts the 4th day of my sugar/placebo pills. I don't end my bleed until approx the monday after I have started my new pack. This is normal and completely fine. You do not have to take the 4th week of pills. They are simply sugar pills as you know to keep you in the habit of taking a pill daily. I never take them, because they are non-hormonal. If you think you may forget to start up your new pack on that sunday then take them they don't harm nor help you.

Same thing here. Perfectly normal.