this happened about TWO days ago. me and my boyfriend were messing around. when he put this head of his penis in me for maybe 10 seconds. we are both positive he did NOT cum. but unsure about the pre_cum . i havnt started my period and im unsure when im supposed to . there was no birth contol or condoms. which is a shame on me. but im scared. i know there may or may not be sprem in pre-cum but id like the odds .