when should i see a doctor?

so i've never been officially diagnosed with PCOS, but have had many doctors say they're fairly certain i have it (but I have never seen a gynecologist to confirm). my period is naturally irregular, i can go quite awhile without getting one.

here's my dilemma: this past month my BC prescription didn't refill, so I wasn't taking it. me and my boyfriend had unprotected sex, but he pulled out every time.

i'm now 8 days late for my period, which isn't typically odd for me when not on BC, but now i'm stressed since I had unprotected sex as well. I've taken 2 tests that came up negative, but i've read PCOS can cause false negative pregnancy tests. How long should I give this before seeing a doctor?

side note: i've also had more discharge than usual? idk if this means anything 🤷‍♀️