My partner and I didn't realize the condom broke. This was Friday December 2nd and my period usually comes within three or so days of that. I took Plan within one hour of intercourse. Please note that it is December 8th and my period has not yet come. Also, I am 187 pounds, this being over the weight range of Plan B. I'm in exam period and am stressed and my period had been late last month (was on November 6th instead of 3rd). Please help.