Pregnant, but don't know who is the father

*Okay i'm pregnant and this is my problem with trying to figure out the father

*This happened when i was drinking and had sex with a man when me and my bf was broken up and i dont know if it was protected or not but i remember him going to get protection before we started thats all but i dont know if he got any or used it right

*The date was on Nov 15, 2009 my period was exactly two days after this and was heavy flow on nov 17, 2009

*I usual have a regular cylcle never had two periods in a month or one that lasted really long so should of ovulated on a normal 28-32 cycle

*Well i had sex with a different man on the 29 of Nov 2009 which is a guy ive been with two years going on 3 and he ejaculated in me
which is exactly two weeks from the other man i had sex with

*Ive done all the pregnancy calculators and the conception and ovulation calculators a million times

*I know i'm due on august 26 and that i probably concieved about december 1-7 2009 and my lmp matches with my due date
really well plus my conception date would be right on the dot if it was the second man's baby

*Could anyone tell who the father is i'm a good person and its killing me inside ,I'm alomst due and i dont know what i would do if it wasnt the second mans baby he has been such a amzing guy to me

*PLEASE SOMEONE HELP ME