Hi, I feel and understand your confusion because im going through the exact situation with the only difereence that i truly dont know because i slept with my husband and my friend one day apart from the other... I dont know what to do.. Im scared and the same time I want to keep my baby but its just a mess in my head right now.. I had my first sonogram done today and the dr said its too early to determine how far iam right now but im just sad and stressed and dont know its the only thing that comes trhough my mind right now... .
I agree with Grandmatobe.
Google "pregnancy conception calculator" - that will give you some sites that will calculate conception date based on your due date. Of course, due dates can be off by weeks so a DNA test will still be needed to determine paternity.
Something else to address is STD's but you probably already know that.
Based on this information, I would say your boyfriend. If they gave you a due date of 1/31, you would have conceived sometime in early May (I will assume you had a period the latter part of April). If you went back to the doctors sometime in July, that would have put you around 10-12 weeks, based on the due date they gave you.
If you got pregnant by the one night stand, you would have to assume you ovulated on or around March 29, which would probably would have put your due date around the middle of December, not the end of January.
It could be eather of them.
But this situation could of been VERY
Avoided obiously....but its better
For the baby to be born and take
The DNA test.
the only way to tell for sure would be DNA, but it sounds like the first guy (march 29th) because that would put you at about 11 weeks when you found out.... So yes, unless you're missing a time you had sex it PROBABLY is the first guy, but you will need a DNA test to be sure. Ask your doctors these questions, they can help you chart out your cycle for those first few months and figure out when you conceived.