Why are my lines getting lighter?!?!

Jessica • Married 👰🏼🤵🏻 From England 🏴󠁧󠁢󠁥󠁮󠁧󠁿🇬🇧 Living in China 🇨🇳 Will start TTC from September 👶🏻 PCOS sufferer 😣

It’s still quite early my predicted ovulation date according to glow is on the 19th but why are my lines getting lighter?

Can they go lighter and then go dark again if I ovulate?

First time properly tracking and I have PCOS but not so sever so I’m not so sure.

Thanks girls!