I need advice and please don't be rude

I need advice...I had my period on June 9th 2015 and I had intercourse on June 15th with a man and then had intercourse with another man on June 21st I was told I conceived on June 23rd and found out I was pregnant through blood work on July 1st which my hcg was 50 and my due date is March 15th of 2016, so my question is which one would be the father and another is, is there anyway to get help with DNA testing I want to do the prenatal paternity test but it's expensive and was wondering is there a way to get help to pay for it?