Very late AF / No AF


I’m 5 days late for my period and never have been 5 days late ever I only have 2 more days left for AF to show and yess I took many pregnancy test They all came back BFN soo im just considering getting blood test now I basically missed the mouth of August period just to give y’all a run down here are my periods since July and now btw I had my full blown period on the 1st of July and had bleeding again on the 28th of July which was little to none someone please help me ... should I get blood test ? And the picture shows the month of July.. and the light bleeding stopped at the being of August