Is it possible? Please help!!

Cicily • 👫 09/02/2013 He became my forever 👦🏼05/12/2015 our miracle boy Ezra was born 👼🏼👼🏼4/10/2017 emma and emmett fly to heaven 👶🏼👶🏻 02/11/2018 IVF twins Lincoln and Elosie are born
Okay so I took a test last Friday and got what appeared to be a vvfl then took another a couple days later and it was negative and then another vfl then another negative! What the heck is going on? Is it just that both are evap lines?! All pics were taken in time frame.. Anyone ever experience this? Thanks!