I got VVFL positive at 10 Dpo, and then stark negative at 11 dpo,

My 10 Dpo urine was FMU - VVFL showed up within 2 minutes

11 Dpo Urine was diluted - Stark Negative

maybe that caused it to be negative ?

Top One is 10 Dpo - VVVFL

Bottom one is 11 Dpo And Stark Negative