Confused...

So wev been trying for the last two months

I got a straight negative, and found it 1week ago still clear as day negative.

6dpo I swear I got a faint line (yes way early) then hours later it darkend?

Took a test yesterday, 9dpo and it was negative the same again a faint line appeared hour later,

So how come last month when I tested clear as day negative and stayed clear negative for a MONTH then now the last two times I have tested its had "evaporation lines? 😲

6dpo

9dpo