Me & my bf had sex on the 4th day of my period; JULY 30th.

He came in me & my period is now a day late. I took a pregnancy test using FIRST RESPONSE & I can’t tell if it’s a evap line or what? So I took another test which was CLEAR BLUE DIGITAL & it said not pregnant.. I supposedly didn’t ovulate till AUGUST 8th. I honestly don’t think I am. But I have heard about FRER having evap lines. The line doesn’t have any color.

My cycle came on July 27th & ended on August 2nd.

What do you guys think?