guys 😳😭 i need help, i had sex about a month ago right after my period ended with my boyfriend and i decided that he should cum on my back,he did and he caught it slipping down my buttcrack onto my asshole and he said it stopped there, i've been stressed all month and today was the day my period was supposed to start again and yes we used a condom lol it had no holes or anything and i haven't started my period today at all, i don't know what to do and i feel horrible with myself because i'm 13... please no shame or bashing me i come here for help because i don't wanna tell my mom this, i don't wanna have sex but i do it for him, what do i do? is it late because of stress or something else (update: i had to tell my mom i was to stressed, she's being nice about it but hopes i'm not pregnant)