take a test or not yet

Emily
I'm going to take a test on the 7th as af is due on the 9th does anyone think I should wait. And what test is reliable as not sure been taking test and found out they are not good tests they lie so need a good test 
Story time 
I took a test and it came back with nothing I took another same again so I thought I would use cola with a test and nothing it should have come back with two lines but nothing so I used a different test with the same cola and came up with two lines so I used the test early and came up with vvvfl so please help not sure what to do