is this a early positive or a evaporation line?

Alyson • Im just a down to earth kind of girl :)
I took this this past Saturday with one of those that can detect 5 days before your missed period. Well I took a cheap dollar one two days later but it came up negative but on the box it said you take it after your missed period. Should I wait some more or should I just go get some more if the early detection ones? I'm excited and nervous at the same time. And this would be my first.