Pink Spotting

Hey y'all. I have PCOS and have been on metformin for 2 months. I am not positive that I ovulated this month, but judging by my CM, I am about 6-7dpo. When I went to the bathroom earlier, I had a little bright pink spotting. I don't wanna get my hopes up...but could this be implantation bleeding or is it more likely that my progesterone is just messed up...again? Thanks y'all!