Conception Date - Should I Stop Worrying?

Hello, I'll make this as short and accurate as possible.
This issue has been driving me insane for almost 2 years now.
Anyways, I was with a woman on June 13th 2009. We had sexual intercourse.
It was protected at first but half way through the condom came off. Stupidly, we continued.
The withdrawal method was used & I am 75% certain no ejaculate escaped inside.

About 2 months later I was informed that she was pregnant. She told me that the conception date (because I inquired) determined by her doctors was on July 17th 2009. Which is 1 Month and 4 days after the encounter. The due date was 4/11/2010. The baby was born on 4/7/2010. I was never informed if she had a period after the encounter. She has never accused me of being the father. It was not brought up even once. I am not in contact with this person any longer because of an incident that occurred between us so I am unable to contact her, and even if I was able to I wouldn't. Her partner at the time of the pregnancy was the assumed father and they are still together.

What are the chances that our encounter on the 13th of June possibly resulted in conception.
This issue is driving me insane! Just thinking about the possibility of it makes me have severe anxiety.
Should I forget about it since the estimated date of conception was over 1 month after our encounter? Should I stop thinking about it since she has not made any implications that I might be the father? Obviously I am the one worried about it and not her or else she would have made it clear a long, long time ago. We never discussed any possibility that I might be the father of the child, I have just worried about it to myself ever since. It was the biggest mistake I ever made. If I could go back in time I would do it all differently.

Any replies or advice would be greatly appreciated.
Thank You!

[Clysta]

No, you should not worry. If you were the father, she would have given birth much sooner. I should warn you though the "withdrawal" method is completely worthless and offers NO protection against pregnancy. You do not need to ejaculation to get a female pregnant, as pre-ejaculation is always present when a male is aroused, and he does not feel when it is secreted.

[funnsizemommy]

Its possible.... DNA is my best advice

[JoeGetrarda]

Thanks, I thought so. It's good to hear someone else thinking the same thing I have. And I am aware of the whole withdrawal thing, it never really made sense to me how that would completely protect you from pregnancy.

[JoeGetrarda]

DNA is not possible as I am not in contact with this person & I would not want to cause turmoil in their family. I figure that If she was ever concerned she would have requested that I take a test which I would have willingly consented to.

[cminamyer]

There is no way you are the father. The latest that conception could have occurred would have been the 18th of June...that's the longest that sperm can live inside of a women. If she conceived on 18 June and had the baby on 7 April then she would have been about 44 weeks along...Dr's will not let you go past 42 weeks. They baby would have been delivered much sooner, by 44 weeks the placenta would have given out...there wouldn't be enough room for the baby and probably no more amniotic fluid.

A normal pregnancy is 40 weeks...they count pregnancy from your LMP which is usually 2 weeks before you even conceive. The day she had the baby and her due date put her conception around the middle of July.

[JoeGetrarda]

Thanks, you have definitely reassured me!
Everyone's replies are greatly appreciated!

[FreshLove]

Yeah, the baby most definitely is not yours. As previously stated, sperm can only live for about 5 days in PERFECT conditions and even if the doctors were off by a week or two you still wouldn't be the father because there's a months difference. Go ahead and put your mind at ease (and try to avoid another situation like this).

[JoeGetrarda]

Thank you so much. My mind is definitely more at ease thanks to this post!
Believe me, a situation like this will never happen again! I've definitely taught myself a lesson from all of my worry.