Freeking, unfortunately none of us can give you an accurate answer. I'm sorry, and understand this must be emotionally challenging. As Annie said, you will need to do a DNA test for conclusive answers. I wish you all the best.
When you say, in your initial post, "it says my conceived date would be 09/10/18" I assume you meant 04/10/18? And when you say just above, "I was feeling pregnancy feels for about a week from aug 14th," I assume you mean April 14th? It's pretty hard to understand your posts.
What I *think* you are saying is:
First day of last period March 26
Sex April 9 with someone not boyfriend, used condom
Sex on April 9 with boyfriend, no condom
Sex on April 13 with boyfriend, no condom
Feeling pregnancy symptoms April 14-21
First ultrasound around April 23, due date given was Jan. 1
Second ultrasound (date not mentioned) due date given was Dec. 31
If I'm guessing right and the list above is correct, your ultrasounds do point to April 9 as the date of conception.
That means it all hangs on how careful you and the guy who is not your boyfriend were when using the condom. Condoms are supposed to be put on before the guy even gets hard, to avoid pre-ejaculatory fluid from getting into the woman from pre-penetration contact with the penis, or possibly fluid getting onto the outside of the condom. Pre-ejaculatory fluid can contain sperm. It's not a source of sperm, but if the guy has had an ejaculation prior to getting the erection with you, there can be sperm left in his urethra, and it can hitch a ride down the penis into your body before the condom goes on. If you can remember the condom use, was it perfect or was it haphazard, maybe being put on late or slipping?
If you have a big budget, you can do a pre-natal DNA test right now. I suggest Ravgen or the DDC, Ravgen if you want to keep the test of your boyfriend a secret from him. If the high cost of pre-natal testing is just impossible, post-natal tests are much cheaper than pre-natal tests (about a tenth as costly), and one has to be done in your case for sure. Many women just wait and do one after the baby is born because of the cost. In either case, your best bet is to test with both men.
Often women write in saying that telling their boyfriend that there is a reason to test will mean the end of the relationship, even if he is proven to be the father. If you simply cannot stand the idea of having to admit to your boyfriend that you slept with someone else, then at the very least, test with Mr. Not Boyfriend when the baby comes. It would be morally wrong not to test, everyone deserves to know for sure, especially your child. Also, in this day and age of doing 23-And-Me kinds of DNA tests just for fun, there is every chance that your child will someday do one, and find out if his assumed father is not his father. The conversation to avoid is not the one this year where you say casually to your boyfriend that he has the right to ask for a DNA test before taking on the job of dad, and so let's go ahead and do one when the baby comes so he will never have to wonder. The conversation you REALLY don't want to have is one 21 years from now when your beloved child who has trusted you all his life asks why you lied to him all these years about something as important as his paternity. The truth's going to out, and when it comes to paternity, sooner is much better than later.
OK, if they told you that you were 4 weeks pregnant, that would have to be just calculated from the first day of your last period. Did you have a second ultrasound, and did they confirm or change the due date based on the second one?
Also, could you explain what the following means from your original question:
"I felt symptoms starting April 14 18"
"I did have sex on April 9 with 2 people I used a condom with one and if I can remember he did nut in me guy with no condom"
Hi, Freeking, did you have an ultrasound early in the pregnancy? Did they give you a due date?