VVFL? How long does it take for FRER’s to get darker?

D • 30, UK 🇬🇧 Mama to a 34 week preemie 💙

So yesterday I had what I think is a VVFL at 8DPO with a FRER. Today at 9DPO it looks pretty similar and only veeeeery slightly darker than yesterday’s.... how long until it’ll be a clear positive (if it is...)? I’m scared to even think I’m pregnant yet 😩

What do you guys think- is this positive? VVFL? Indent? Ughhhhh I hate this wait!

FYI pics took within 3 mins of test, after 4-5 hour urine hold!