yes, my pills are 7 days too. many are. any time OVER seven days becomes a problem, so if you miss the first pill or take it WAY late, then you may compromise your protection.
ALL pills are designed to protect you all day every day of the month IF taken properly. If they did not always protect you, then I'm sure there would be MANY warnings about when you cannot have sex.
The work by suppressing ovulation, and since your hormone levels only begin to drop far enough to ovulate AFTER and only AFTER 7 days, you are therefor protected every day of the month.
All you have to do is take one pill a day, every day, and you will be protected (as long as you do not vomit, have severe diarrhea, or take contradicting medications)
This makes your chance of pregnancy VERY VERY VERY slim (less than 1%).
Hope this helps, I know sometimes some reassurance is necessary.