Pcos miss or something more?

Shyanne

I am currently 12 days late on my period. The last 2 periods I had were pretty normal, like as it when they came and how heavy/light they were. Well in early October (Oct 7th to be exact) I started metformin. Well my period for October never came, so I'm wondering do I test or is this just because of pcos? Helpppp pleaseeee!!