Help :(

ja

In the past three days I have been receiving very faint pregnancy tests. The first pregnancy test was very faint line that I had to squint to see it. My second pregnancy test was done that same day and the line got darker. Yesterday I took another one and it was back to being very faint again to the point where I had to squint. Any idea what is going on? Could this be a chemical pregnancy? This is the photo of my darkest pregnancy test.