Most Accurate Preg Test

Iza
What the most accurate preg test to u i bought some cvs test and i just feel they r cheap and full of shit im 6 days af late and still getting negative but all 3 test seem like they didnt come out right the first the line in the same circleis not there 2nd one is very yellow in color and the 3rd one is just really light  what do u think ???