Sex 3 days after my period was over...

Hi there, I had my period from 04/02/2007 till 04/05/2007, and Had sex on 04/08/2007, and on 04/09/2007. Can I become pregnet? or is it too early for that? Iam a bit confused on how the whole cylce thing works and fertile and ovulation process works... I was told you can not get pregnet if you have sex after your period for a week, and My period ended on Thursday and I had sex on Sunday and Monday... I was told that you have to wait two weeks after your period is over to actually become pregnet, but I am not sure if that is accurate information. Please reply back and help, could I be pregnet if I had sex 3 days after my period was over? Please someone reply back to me, I want to know if it is a High possibility and I know I have to wait and take the test, but I just want to know how hight is the possibility???