Same urine sample and different readings

Naina

I hope what I have experienced no one else experience it's hell frustrating, I'm at 8 DPO and did the test using my FMU in first test I got faint but very clearly visible positive and on second I got negative and to be sure, I did the 3rd test that was negative again and now I'm confused what's happening. Anyone of you have experienced the same ? What was the final out come ? Test I'm using is from same batch. Should I switch the brand or wait ?

Hell lot of things crossing my mind .