skipped period / late ovulation??

hi all! i’m currently 9 days late. the most i’ve ever been late was 6 days (i’m irregular and a heavy bleeder) so i’m a little concerned.

i’ve taken 6 tests and they have all come back negative. (i’m prone to stomach problems and anxiety) i’ve had NO symptoms whatsoever. i was really stressed the week before my expected period (august 1st-7th, expected period on the 10th) so i’m not sure if that has anything to do with a possible skipped period/ late ovulation?? if anyone has some insight or has been through before, let me know 💕

also — when would be a good time to see a OBGYN if my period doesn’t come??