Pregnancy tests

Has anyone ever had an issue with a bad reading with accu-clear? I was due for AF Feb 9th & still haven't gotten it. So I bought an accu-clear test. The cashier told me she had multiple neg results with this brand but tested positive on another brand (the ones from dollar tree). So I would like to know if anyone else has had an issue with this brand? Trying to decide if I need to try a different brand?