First Response vs. Walmart Brand !

I took a first response pregnancy test this morning and it showed a very faint line, then I took a cheap Walmart brand pregnancy test and it showed nothing ?

I also took a clear blue digital, it said 5 days sooner and it said NOT PREGNANT!

Should I be worried?

I’m already worried and stressing since this would be my first baby after a miscarriage in April.

1 day until AF is due !