PCOS? I think? Kinda confused 🤔

Today I went to my first OBGYN appointment ever and mentioned on my intake sheet that I've had PCOS symptoms for the past few years (I've never been for sure diagnosed with it yet, but have had almost all the symptoms regularly). My doc didn't do any testing or exam whatsoever, which seemed odd to me, maybe it was because I'm 18? But she prescribe me Metformin and progesterone because I won't take oral contraceptives (my last cycle was around May 23).

So does this mean that I was right in the fact that I have PCOS?

Also what has been people's experience with Metformin? (She started me on once a day for a week but then working up to twice a day after the first week)