Please help! I had sex 9th September with a condom, then had sex without a condom sometime in October. And then a little period in November. Turns out I'm 17 weeks pregnant, found out yesterday, and due in end of July! Please help me sort out the day I conceived!!

Impossible to tell for sure.
If there are doubts concerning paternity then a DNA test after the birth would be in order.

How many weeks do I need to count back to try figure it out?

If paternity is in question you will need too wait until the baby I born to have a paternity test performed.

Conception dating is an inexact science. Every woman ovulate sat different times in their cycles. Since you don't know exactly when you ovulated it's impossible to tell when you conceived.

17, but that would only be a guess at best as conception dates are not that exact. It could be a week, or days off.

Why is the exact conception date important? Different guys? Hey look adults aren't dumb, and when the conception dates are an issue it's usually because who is the daddy is in doubt. In that case you either tell the guys involved you are pregnant, and they may be the daddy, and have them take a test when the child is born.

Then you can figure out the conception date accurately. Am I right or wrong here?

Yes I know that! I need to know he wni try figure out the day I conceived there's a whole month between the two men and I wore protection with the September one. Please I really need help I wasn't worried at first I knew it was the October one but people have worried me! Please help

There is nothing we can help you with. We don't know when you ovulated.

Stop letting people worry you, because NO ONE can know for sure when you conceived, until the baby gets here, and you have a paternity test done.

Who is putting all this pressure on you?

Did you have a period in September and October? With being considered 17 weeks at this point, and due late July, you would have most likely conceived in October. If you had conceived from the Sept. 9th encounter, even if ovulation and fertilization occurred several days after the encounter, you would be due in June. You would have almost a 5 week difference.As the others have said, since you have concern about it, simply have DNA testing done once baby is born.