Broken condom+ plan B+ Patch= late period. When should I start to worry???

Hi ladies, so here's the story. On June 30 I had sex and the condom broke. My boyfriend and I dont know if everything came in, however I felt some of his cum fall on my leg. So, I decided to take the plan B pill the next morning to be safe. A few days later I put on the evra patch for the first time after 2 months of not wearing it. (I have been using it for a while but stopped using it because I went on exchange) Now I was supposed to get my period in June 11-12 and it is June 13th and still nothing. I normally always get my period on time and also tend to get my period early whenever I take the plan B. Should I start to worry now? So far I have no major symptoms except light cramps.