Help me tell which one is the father of my unborn baby

[terra11th]

Hi. I had sex with 2 different guys (just one day apart) right on the estimated start of my fertility window. My fertility calculator app tells me that my fertile period starts 9-10 days after my LMP. I know this should be taken as just an approximate but I noticed how my menstrual cycles are almost  accurately predicted by this app. I (oddly enough) took a HPT and was shocked when I saw it showed positive. I took 4 more to this date on a daily basis and they all showed ( + ). Both guys have different races, I wouldn't need to waste time and money on DNA tests to know who the father is after birth. I'm just really worried and am extremely anxious and hoping that Guy#1 is the father of my baby. Please help :(

Had first day of last period on (April 2, 2016)
Sex with guy #1 on (April 13 & 17, yes twice with this guy during fertility period)
Sex with guy #2 on(April 14)
All sex was unprotected with guy [#1] [#2]
Period was due (May 2)
I had very light brown spotting on  April 29, 30, and May 2
Learned of the pregnancy by home test on  April 30 (2 days before estimated period)
I Have NOT yet had an ultrasound
My periods are regular and my cycle is usually 28 days long

[terra11th]

Hi Annie,

Thank you for replying. I should definitely try prenatal DNA test.

[AnnieBrooke]

Sperm can live up to 5 or 6 days in your reproductive tract, which means you had living sperm from both guys in your system at the time you probably ovulated, given that your ovulation was expected around the 16th.  It would then just be a matter of which sperm met the egg.  It isn't possible to parse out April 13, 14 and 17 and say one day is more likely than another, if you feel you would have ovulated at mid-cycle in a regular way.  I'm sorry.  If you want to do a prenatal DNA test, try Ravgen or the DDC.  It is expensive but if you are really worried and extremely anxious as you say, it might be worth it.