Neither one of these two men.

You got pregnant after your period from unprotected sex some time in the first week of October (1 to 8 October).

Ok so that would make it with my current boyfriend....so theres no way it would be with number 1? We had sex on sep 5th. And why did the doctor say im 6 weeks and 4 days? Do they add 2 weeks to your pregnancy?

Yes, in the USA 2 weeks normally gets added to give you a gestational age based on your last menstrual period (even though this may not be 2 weeks in reality). Working back from your due date takes this variable out of the eqation.