I had unprotected sex on my last day of period and he masturbate outside and theirs a blood came out to me after sex. It was may 10 and then may 16 I also have unprotected sex and he withdraw his sperm inside me. And now I'm so confused who is the father of my baby or has the big chance of the father or my baby.. Thanks so much... :((

Unfortunately your dates of encounters are too close to determine paternity by dates alone. You will have to have a DNA test done after the baby is born to determine who the father is.

Unfortunately your dates of encounters are too close to determine paternity by dates alone. You will have to have a DNA test done after the baby is born to determine who the father is.

But who do you think has the big chance ? :((((( the first or the second? :((((

I think it's one or the other. There is no way to even guess which one it is.

'Chance', 'odds', and 'probability' all mean the same thing.
When you have sex with more than one partner, many VARIABLES affect the chances of conception.
We do know that the variable of when in your cycle you have sex affects the chances.
We do know that the variable of sperm ejaculated inside or outside of the vagina affects the chances.
There are other variables too, such as how potent a man's sperm is.
Each variable has it's own range of how likely it is to happen! For instance, most women are most likely to conceive mid-month, but that can vary from woman to woman, or even month to month. And more pregnancies occur when ejaculation happens inside the vagina, but plenty of women get pregnant when it's outside too, just fewer.

If you want odds, the odds SHOULD be greater that the second encounter got you pregnant. But if you fall into the group of the lower odds, that man is still 100% the father.
Does that make sense?