i had sex with my gf on 24th of may,, my condom torned away and the sperm went into her vagina,,,,i gave her i pill after 5-6 hours,,,,,she had periods the next day , i.e, 25th of may in the evening just once and periods stopped,,,,she had her last menstrual cycle on 18th of april,,,,,,is everything ok,,,,is there any chance of getting pregnant?