I have done protected sex with my gf for 5 seconds because we don't want pregnancy that's why after removing condom I see one drop of something inside it but the condom is not broken and also there is no slippage I have done sex last month 29 and this month on 10 she gets her period as her normal period time is every 15th of month is there any problem is any chances of getting her pregnant please help me and request to give an accurate answer.