Sir I M Just Become 18 And Hada Anal With

Sir i m just become 18 and hada anal with my a girl it was our first tym..we dont know really hv to have sex during anal sex it was not proper anal i just put my penis a little bit inside her anus and i got on my cut on my penis..which was bleeding..so would tht blood would cause hiv / aids in anyone of u..or semen release during a sex can a girl become pregenent ?