Bad test

So I took a Walmart early detection test yesterday afternoon and got a faint blue line. I took a first response just about 20 min ago and it is clearly negative. My urine was a little dilute, but I guess the Walmart tests can’t be trusted.

Edited to add that I am CD 41, with PCOS and spotting as of yesterday. My last cycle lasted 78 days. I have 2 children and had a miscarriage last August. 38 yrs old.

***update. AF showed today full flow 😭