My boyfriend and I are always very careful when we have sex. I'm on birth control and we also use condoms with spermicide but i can't help but wonder and worry about possibly being pregnant. The other night we had sex, and it was the day my period ended and the day I start my birth control again, when he came and pulled out the condom slipped off and he told me that I had white stuff on me. Neither of us are sure is it was cum, spermicide or whatever fluids came out of me. If it was cum, could I become pregnant from it, given everything I said we do to try to prevent it?