I start my new packs on Sunday's and have never missed a pill until yesterday. I started my placebo pill week Monday and had unprotected sex with my partner Sunday evening. Shortly afterwards I realized that I didn't have my pack to start my new set of pills. I called for my prescription and can't get it until this evening. I have never missed a pill or even taken one more than 20 min late (which was rare) so I've never had to be well versed in what to do when I miss. I was just wondering if I needed to get Plan B when I picked up my birth control this evening. Thanks!