HELP PLEASE why does it keep saying this

Sam

My first test showed both lines very faintly but was told it was invalid and now my second test doesn't show anything in the first window it shows a strong line in second window? Why does it keep doing this.

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors