According to my pregnancy wheel calculator, by either of the due dates you were given, you should not have conceived before November 25. The timing IS pretty close, although from what you say about the encounter, its unlikely that your ex is the guy. The true way to find out for certain is a DNA test. These are easily available, and your doctor should have information on how to get one done. The biggest problem with the tests is their cost--they often run around $1000.
You may want to discuss the issue with your current man, and decide how important the answer is to each of you--he may want the test and be willing to spring for it.
i am in a similar situation and if ANYONE responds to you PLEASE email me at ***@**** and tell me what you think!! as im sure you know it would be GREATLY appreciated!! Thanks and good luck!
From what I've read over the past year or two, sperm really only life in you for a few days, from what you've said, he didn't ejaculate, and even with pre-*** (hypothetical pre-***), it would only really live for about 3 days afterwards. So I think you're pretty safe.
If you're not sure, the best way (if you really don't want to confront your boyfriend) is to see if your ex is kind enough to take one of those home paternity tests. So that way, you can rule him out.
I agree with Ashbash250....it is looking a lot more likely that the current bf is the daddy..
Thanks a lot guys!! Really.