What's the likelihood of pregnancy if cycle started 7/6, she bled 16-18th, sex on 18th with dual spermicide but condom leaked? ec taken 12hrs after

Pregnancy unlikely: Regardless of spermicides or condoms, Plan B and or "EC pills" can alter the menstrual bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, to confirm non-pregnancy, because "EC pills" work most of the time but not all the time.