Skipped af?

My last period was July 29th-August 2nd... My period was suppose to start according to glow on the sept 7th... I am now 52 days in to this cycle and still no period ( 1 week 4 days late).... I took a test on the 9th and it was bfn...should i test again. When should I test again.. Or did I just skip a period this month ( which as never happened)