My daughter started the pills 3 months ago but her period comes 5 days early every month is this normal and is it still effective also she is getting married in 3 months and right now her period will arriv right then how can we avoid this timing and will it still be effective she has a period of only 3 days mainly spotting should she skip the sugar pills and change the period schedule for her wedding or will this effect the birth control effectivenss