Plan B - Hi, so I have somewhat of a serious problem that is making me really confused & nervous.?

Added 8 Feb 2015:

Sorry I'm new to this and thought the whole thing posted, but I guess not. Anyway basically last month I got my period on the 30th, so this month I was obviously expecting to get it on or around the same time, but I didn't I was already late able it a day or so (without having sex). But then that Saturday night (the 31st) I had sex with my boyfriend, used a condom, but somehow it like completely shattered because there was a reallh big hole in it. So he obviously came in me, but the next day at around 1-2 in the afternoon I got and took the plan B one step pill (Sunday, the 1st). Today actually makes exactly a week since I've taken it and still no period. But I have still been getting symptoms for my period (that which could also be seen as symptoms from taking the pill) such as super tender breasts, pre-cramps, and some nausea. Now I know that the plan b pill is notorious for delaying people's periods, but this is the 2nd time I ever taken it, and the first time my period basically came on time. Now I still and I'm starting to get really nervous. Please help, what does this mean or could mean, and what should I do?!

Added 8 Feb 2015:

Sorry I'm new to this and thought the whole thing posted, but I guess not. Anyway basically last month I got my period on the 30th, so this month I was obviously expecting to get it on or around the same time, but I didn't I was already late by about a day or so (naturally, without having sex). But then that Saturday night (the 31st) I had sex with my boyfriend, used a condom, but somehow it like completely shattered because there was a reallh big hole in it. So he obviously came in me, but the next day at around 1-2 in the afternoon I got and took the plan B one step pill (Sunday, the 1st). Today actually makes exactly a week since I've taken it and still no period. But I have still been getting symptoms for my period (that which could also be seen as symptoms from taking the pill) such as super tender breasts, pre-cramps, and some nausea. Now I know that the plan b pill is notorious for delaying people's periods, but this is the 2nd time I ever taken it, and the first time my period basically came on time. Now I still and I'm starting to get really nervous. Please help, what does this mean or could mean, and what should I do?!