So confused

All had shown up with faint lines the camera would not pick up. But now they are darker and all have color. Since i seen line right away and took long to get dark, are these BFP? 4 faints turned darker seems to me BFP. But my luck I got 4 bad tests. Sorry if you already read similar post. I just can't help but think my levels are a tad to low yet... ahhh