So yesterday last night Nov 19 my boyfriend and I was messing around and he came near my vagina and it was p ejaculation (pre-***).Then he put on a condom he touch it and I'm not sure if he came inside are not. But we didn't have sex I want him to put it on to avoid me getting pregnant. But anyway i think he may had sperm on his finger, after that He touched touch it to fix it but I'm not sure if it had sperm in it. He fingered me few mins after he touch it. I been on birth control since I was 16, I'm 23 now. Should I buy plan b? if my period comes in 5 days.