Test was negative and then 3 hours after it became invalid it has a strong thin purple line. Does that happen with the Walmart .88 tests? I KNOW it isn’t a valid test nor do I want it to be positive, so seeing that has me a little spooked as I just became okay with being one and done after years of secondary infertility. (Yes I’m dehydrated LOL took a test due to nausea for the past few days) I didn’t know where else to ask if anybody has experienced this with first signal tests. My apologies if this isn’t the place. I don’t wanna get torn apart, I want to be clear I know this is NOT positive.