Well, lots of factors to think about. they go by 7 days rules
Some info:
Sperms stay for about 7 days
egg last for 1-3 days
usually ovulation (release of 'egg') starts 2 weeks b4 the start of next 'period or menses'
if ur gf's period is regular, say 28 days cycle, then egg will be released on the 14th days
'bleeding period' usually last for 5 days,
in ur case:
she had 5 days + 3 days b4 ur sex and ejeculation= day 8
if the sprm last for 7 days then it will be till day 15,
if she release egg on day 14, there is still a chance
but....
its all depending on her period cycle. If her cycle is 35 days then you will be safe as egg only release 14 days b4 the next period cycle.
even if her period is 28 days. the chances is less as you know the longer the sperm stay in her body, the less will be still surviving.
So if she has her next period then u know u are safe.....
be careful next time dude...
