Help ladies!

I am not sure when I conceived. I have not been to the doctors. I missed my period. It's been 8 days now. Took a test it was extremely faint.

I have slept with two different men.

I am mostly hoping it is guy number two. But when I plug in the numbers for the pregnancy calculator I get that I conceived 9/17/2017.

Me and the 2 guy had sex multiple time on 9/28/17.

Now the first guy and I had sex around the 17th but it was with a condom. I have never been about to fall pregnant while having sex with him for a year off and on.

Not totally ruled out, I know.

But are these calculators on point. Or could I have conceived on 9/28/2017? And the calculator just going by my period? I'm confused?!

If anyone know something please spill tea!

Edit: the pregnancy calculator estimated my conception date to be 9/17/2017. But this doesn't mean I got pregnant this day?