There is no way to know whom the father is until you do that test... You slept with them both with a 7 day period so just go ahead and tell them both and let them prepare to have to take a test... What ever you do don't make it Hardee than it has to be... Good luck!!!
Oops meant to say 28 days lol
Exactly its depends on your cycle. I know mine is 38 days so I ovulate on day 14 normally. But they can come a day or 2 earlier. Ovulation can be between 11 and 16. Best to get blood test then try and work out.uBut if not one way or other way paternity test.
If you have a twenty eight day cycle, then you most likely ovulated around the 26th. So I would say B. But just remember that is not exact and sperm can live for 72 hours, so if you ovulated a little earlier then it could be A. The best bet is a paternity test.