Even during your 7 day break, you are protected from pregnancy. I'm not sure where you read/heard you aren't until your second day...
If you choose to take the morning after pill, you should read the directions and the side effects very carefully. There is a risk that your periods will be screwed up for 3 months after taking it. There are hundreds of questions about potential pregnancy after the use of plan b that could be easily answered by reading the instructions/side effects.
It is doubtful you are at risk of pregnancy if you have been taking your pills every day. A few hours late here or there is not that big of a deal.
If you want to double up on your protection, have your boyfriend wear condoms.
Take a pregnancy test if you feel you are pregnant.