Me and my boyfriend never have protected sex and he allways c***s inside of me. My LMP was sept 28 and ended on oct 2. We had sex proboly 3 times in the following weeks as we normally do. I have a conception date of oct 12. It lines up with my LMP date, and also, I had an US on 11/22/11 saying I was 7wks 6days, which also lines up my conception of oct 12. Before my US, MY hcg levels came back as 855 on 10/28 and 7,460 on 11/02. So I did have sex with my boyfriend around the time of oct 12 (before and after) but I also had sex with someone else on oct 16 and he also did what mu boyfriend does. I had sex with my boyfriend too on oct 15. Is my boyfriend the father how I think he is?

There is no way to tell, estimated due dates are just that educated guesses. They are normally give or take one to two weeks.

So until the child is born and there is a DNA test to be sure, no one will know who the father is

I considered my hcg levels not being a guess they they are very accurate in early pregnancy and also I was told that early US are also. I can see if I was just guessing off my LMP, but I thought my info was more concrete.

As Fr_Chuck said, there is no way to know whi the father is because these dates are so close together. The only thing to do is get genetic testing for both of the men involved.