equate from walmart

how accurate is pregnancy test equate from walmart.. can anyone tell me if there test has come back negative and they were pregnant ... or if they got a answer at all from the test?! i took 2 test 2 to 3 days before my period was due and one didnt give any answer and the other had a line the even up close it was hard to see but now im 2 days late and dont know if i should go buy a diffrent brand.. and advice please