Help/questions

Di
Based on my opk's I'm 2dpo, but based on my bbt I'm 8dpo. I have pcos so I know opk's aren't recommended, too. That just adds to my confusion. Which do I consider true? My CM is never an indicator for it Bc it doesn't really ever change. I use pre-seed to make up for the fact that I never get EWCM. Any thoughts?