Please help! Pregmate evap!?

Amelia

Hi ladies!

Has anyone had experience with false positive/evaps on pregmate strips? My period was due today, so I took a test, and I think I see a faint line. About an hour later, I started my period. It’s a moderately heavy flow, more than what I’d expect for implantation bleeding. I’m wondering if this is either a) a chemical pregnancy or b) a false positive/evaporation line. Thoughts??