I hate to admit this but I had Sex on the 7th with an ex boyfriend and then had sex on the 13-15 with my boyfriend now my ex and I only were together once and used the pull out method and my bofriend now had sex more than once on each night also using the pull out method my period was on the 1st to the 5th of that same month how can I tell what day I got pregnant.

There is not a great way to make an accurate determination without DNA testing of the child once he/she is born.

You need to be honest with both parties about your infidelities. A child is a lifelong commitment and it of poor ethical character to guess and hope that you choose the right father, please use DNA testing to confirm since you are unsure. It wouldn't be fair to either male, if you do not.

Ok ( still laughting) pull out is not a method, it is having unprotected sex. So pull out and method do not go in the same sentence together.

What you had was completely unprotected sex with two differnet people within basically a week.

There is no way to tell who it is , till the baby is born and you do a DNA tests,