WHY DOES GLOW TELL US TO TEST SO EARLY?..

... I think im only 8-9dpo but glow told me to test this morning (and obviously i don't need much encouragement!..haha) but it was a bfn 😢. I know it's still early and there's still chance, but it's still so disheartening! Silly app! Haha...ok I feel better now. Thanks😊