... took 2 one day and teo the next so i'd be back on track. i had sex on that thursday, and the condol broke, and my info packet said use backup contraception which we did but it failed. so i bought plan b 2 says laters (saturday) im still worried i could be pregnant, because then on thursday (the 20th) i had sex again & he pulled out but when i wrnt to go take my pill i realized i missed wednesday's pill, sk i thook both, but someone told me once you miss more than 2 in a pack it doesn't work???