Let’s talk faint lines

Okay so, tomorrow starts my fertile window and we will be using Preseed after hearing all of the wonderful stories about it. I was wondering how faint a line could be and you actually be pregnant? I intend to use only pink dye or a digital test. But I see pictures and you literally gotta strain your eyes on some of those to see the second line and everyone is like “omg congrats” so.. is that PREGNANT or chemical or what? 🤔🤔🤔 I hope my test is plain as day as with my first so I don’t have to go thru the stress 🤦🏼‍♀️