I’m confused?

So I posted my tests on here the other day and I was convinced I got a positive on my test and everyone else agreed so I decided to take more First Response and every single one of them had lines. Even my boyfriend could see them. But then I took a clear blue and it was negative and I took another first response this morning and it seems like the line wasn’t there. I’m so confused and frustrated at this point. These

Tests go through Thursday-Sunday. I am also 6 days late.