After Six Days Sex ,i Don't Know That My Sperm

After six days sex ,i don't know that my sperm has entered vagina or not,so please help me ,my girlfriend is pregnant or not me and my gf don't know about pregnancy so please help,she is pregnant or not ,actually when we had sexed then I had not used condom but I had threw my sperm outside but I'm not sure that my sperm has entered vagina or not,so pls help me
Is Misoprostol medicine perfect stopping pregnancy ,pls help me,pls