vfl and then negatives??

Ni

I took a kroger cheapie test yesterday morning at 9/10 dpo & got what i thought was a vvvfl (could only be seen in pictures if it’s inverted colors) Last night & this morning i took two pink dye early result tests that both came up blatantly negative, like i have no doubt that there was only one line.

Any ideas of an explanation? Chemical? False positive?