Currently 6 days late negative test

So as u can see via my chart I have had a period literally on time for the entire year no issues here it is sept 1st and nothing cycle was supposed to start aug 26th and nothing one app says I’m 4 days late Glow says 6 there’s no sign of period and I’ve had 2 negative pregnancy including this morning. I have a tripped planned to PR this Friday for 1.5 weeks and I planned this trip around my period obviously which hasn’t showed her ugly face now I’m stuck on if I should even go! Anybody else having issues this month? Also attached a pic of last month cycle!