i had unprotected sex wid ma girlfriend and i m soo scared help guys i need experts

on 24th i had sex wid ma girlfriend and while having sex she was bleeding and i realli dont rememba tht did i left the sperm inside her or i droped it out and i m scared she is onli 16 years old and i m 19 years old and i m leavin in emirates i mean dubai and while having sex i didnt use any condom or any othr tablets and after having sex i was scared tht day ma friend told me to giv her yasmin pills n she will nt get pregnant buh i m still scared about tht if she gets pregnant it will be a big prob wid me and her n i wanna conferm tht she wont get pregnant i need sum help guys i cant sleep n i m soo scared i need sum experts help about tht yasmin will work after having sex or nt or wt else i can do she took yasmin after having sez like 6 or 7 hours after i need ur help guys i m waiting i will be greatfull to u all if u ppl will help me in this.....
help me as soon as u can.....