Lost and confused

Okay I need help I'm so confused, according to the app I was supposed get AF the 1st of October, I last seen her 9/7. I then spotted the 23rd threw the 26th I believe. I went ahead and downloaded other apps so they say I was supposed to start today, So I tested this a.m. BFN i got the tests from e bay, this is month number 5 of trying. should I wait till this weekend to test or get a different brand of tests, I have also had cm since the 26th and cramps mild ones. Help me please.