On the pill 5+ years, first late period ever, 8 negative pregnancy tests

i’m very much a hypochondriac/suffer from extreme anxiety. i don’t let my partner finish in me and i take my pill around nighttime. if i miss i double up the next day but i usually don’t have any problems. i’m always on time. towards the 3rd day of when i should’ve started, i got the tiniest amount of blood when wiped but too light for pad/tampon. i’ve taken quite literally 7+ tests and all are negative (taken at different points of day)

curious if anyone else has had this issue. i’m currently day 8 late and took a test a minute ago and it’s negative. has anyone ever just randomly skipped a period while on BC for awhile?preg