I took Plan B recently after I accidentally put a small amount of semen inside me. We used a spermicidal condom during sex then after to finish it was taken off after he pulled out. But somehow a little bit of semen was on my finger and it accidentally got inside me. I took Plan B 3 days before my fertile period. And it was 12 hours after sex before I took Plan B. I just am hoping that it works being that I am 200 pounds and 5’ 3”.