"?" On a pregnancy test ?!

Ee
AF was due today, didnt show, had really light pink spotting when i peed' and have been peeing all day and no sign of spotting, SUPPOSEDLY ovulation day was July 18th, took First Response and was negative (before noticing the spotting) then took another one digital after the spotting and got this 😑 
I havent had any period symptoms or any pregnancy symptoms at all only sore breast and tender nipples (but theyre pierced) and really bad hearburn,& mild crampingfor like 8days, thats about it. Any comments are greatly appreciated