Question about chemical..

So yesterday morning my pregnancy test had a vvfl, then yesterday evening it was a clear faint positive. I tested this morning and this afternoon and the line was maybe a bit darker this morning & now it’s a little lighter this afternoon (I did drink a lot tho) I’m used to having my tests darken fast. I can’t help but think I’m having a chemical 😟 has anyone experienced a day of no line progression and ended up having a successful pregnancy??