bfp in walmart but bfn in frer ?

jeny

Im 13dpo and this is my walmart pregnancy test . I want to add that is 2 times more dark than yesterday , the bad thing I took a frer and was negative ,there is possible that walmart are somhow more sensitivy ? I also took a clinical guard and accumed test ,clinical guard negative but accumed has a super skinny line ! more dark than yesterday that was almost negative . what do you think???