Contradicting tests!

I took a FIRST RESPONSE pregnancy test yesterday and got a faint "positive" but wasn't sure to trust it since it seemed faint and I have a Nuva ring. I got sick two weeks ago (that never happens) and just had "the feeling" so I took a test and it kind of looks positive. Anyhow- I went to target today and decided to try the digital tests and purchased a store brand test (Targets Up & Up brand) and got a "not pregnant" what now?! Doesn't anyone have any experience with these target tests? I've included both pictures, the first one with the pink lines taken 6/8 and the digital taken today around 10pm (6/9)