there are a lot of factors that should meet and coincide to create life. its not only a question of did you ejaculate or drip sperm inside her vagina... sperm quality, sperm count, vaginal acidity, egg maturation and cycle, uterine ability to attached the egg if fertilized... and so on... if one is missing life would not be possible
, yet it may all come together and poof your a father now
,, now your going to be paranoid until the day she had her menstruation, i hope you'll be careful next time so as not to relived this anxiety..