hi, I am 26 years, I did sex with my girlfriend , but I did not put my sperm in her vagina, now her periods is late in 6 days, urine test indicate negative but I'm so worry about it. what I do now,(Other thing is, I ejaculate by my self one day before sex with my girl, because I heard that getting 48 hours to redevelop to live sperm) anyone can help? my English is very poor