As Yoshi says, pulling out does not reliably prevent pregnancy, whether the guy had an orgasm or not is sort of immaterial. If this was really 2 days before your ovulation (how do you know? Were you using ovulation test kits?) and if there was another guy in there also in the same time window, you'll need a DNA test when the baby is born. If you want to post your dates, I can help you count it out.
did u sleep with anyone else?
You can never fully trust pulling out. There is pre ejaculation.and for some reason guys will say "oh i dont do that" but yea they do. And you can also get preg if the *** just gets on you. It isnt a very big chance but it is possible.
Are you asking if that's how you could have gotten pregnant?
If your 15 weeks pregnant him ejaculating in your shouldn't be a concern and if your worried about std you should defiantly be weari g a condom for the entire time since body fluids can be passed at any point. I am unsure of exactly what your question is?