i started my period on the 13th. i believe i ended my period on the 18th. i had sex with my boyfriend for the first time on the 18th. and he didnt use anything but we still did it. he went in and out like 6 times and then we just stopped. he didnt cum. but im scared i could get pregnant. he said he masturbated before seeing me but then stopped. then he came over and we had sex but idk if precum can get me pregnant.