I conceived in July and am due in the first week of April..I know when I conceived because it was my husband and I's first month of trying and we got pregnant right away - so I would assume you conceived in the first 3 weeks of July :-). (I'm 32wks right now)
It kind of seems like you already decided who you think the father is. Fact is there really is no way to tell for sure unless you do a DNA test after the baby is here.
The dates are alittle close together to me. I know you want a for sure answer but no one can give that to you. Only way to get it is with a DNA test. Even with a condom it may not have been 100%. My gf has 2 kids from when she was on birth control and using condoms. its not always fool proof.
If you boyfriend is going to step up and be the father then let him but if you think that he is going to question it in the slightest get the DNA test. I'd hate for you guys to have a fight and someone yell out that it may not even be his kid. That would be heartbreaking, better to find out now then down the road.
The father of your child will be whomever steps up to the plate. From the information I see it looks like your bf is most likely the baby daddy, but even protected sex can lead to pregnancy. It makes it less likely, but it can happen. So guy #2 could be the baby daddy too. A DNA test would be your best bet to find the sperm donor.
I agree with the above poster, it would most definitely likely be from the boyfriend.
If I put it into my phone it says you conceived around July 15th. So if you took the test august 1st its possible it was too soon to get a positive. You were definitely pregnant by the time you slept with the guy that is not your boyfriend.