I had intercourse with two men.
The first was on January 24th which was on the last day of my period.
The second was on February 8th.
My period usually lasts 5-6 days, and I don't remember the exact first day of my last period. It's 2-27-12 today and I tested positive on my pregnancy test.
I'd like to know who's the father.

The only way to know for sure is a DNA test after the baby is born as due dates are an estimate and can often be a couple weeks off.

Sorry, I wish we had some way to tell you, but due dates and conception dates are "best guess" And are at the very very very best give or take a week or 10 days, but normally a good give or take two weeks is about the best.

So you will have to get a DNA test done when the child is born.

I'm definitely going to get the DNA test when the baby is born.
Does anyone have an estimate?
Which one might be more likely to be the father?

It would be easier to guess after you've gone to the Dr and they tell you how far along you are. But even then it will only be a complete guess. When you go to the Dr and they give you a due date ask them when they think you conceived. Tough situation. Good luck!

There's no way to even guess since you don't know when your last period was exactly.

If the baby is born in Sept then you got pregnant in Jan. If the baby is born in Oct then you got pregnant in Feb.

If the baby is born in Sept then you got pregnant in Jan. If the baby is born in Oct then you got pregnant in Feb.

Nope. Wrong!

Due dates aren't exact, nor are birth dates. You're not taking into consideration that only 10% of babies are born on their actual due date.

The dates where the OP had sex are less than 2 weeks apart. There's no way to determine who the father is based on that, or on when she gives birth.

A DNA test is the only answer. You can't guess here. And that's all anyone can do. So please stop guessing.