How long does it take to show up good on cheapie

Purp

Cheap test still showing vvvvvvvvfl shouldn't it be progressing? Should my line be getting darker?

Took frer yesterday got a clear faint line and a yes on digital but the cheap test still shows vvvvvvvvvfl im nervous of having a chemical so I'm kinda going crazy🥴🥴

Oh and I can't hold my pee long so I never get to holding for 4 hours to test

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