I had unprotected sex with guy one on April 18 but received my period may 2-5 I then had unprotected sex with guy 2, I missed my period and took a test now I'm pregnant, I also took ovulation test and it stated my conception was may 16, who would likely be father one or two

I had sex with guy two on the 5 of may which was last day of last menstrual, then I haven't Sen period since may 5

Probably #2 but the only way to be completely sure is to have a DNA test done when the baby is born.