Very faint positive, will it go darker one day later?

[Diamondbabe]

Is it worth taking a pregnancy test the next day too? Will it go much darker or stay the same?

Not really, no. IIRC, levels of the hormone double every 3 days, so I'd hold off on doing another test until then.

My lines got darker every day, starting very faint until they were very dark I think I did a test every day until my Dr confirmed with a blood test. I used those thin cheap tests that came with the ovulation tests and kept them in my diary as I was slightly obsessed.