spotting or AF and cycle start date

Lex

so I've always marked the first day of my cycle as the first day of bleeding rather than the day I start spotting, usually 1 day before. The trouble is that this is month 3 of TTC and the last two I started spotting on days 26 and 25 respectively for several days before AF. I didn't think anything of it until I noticed EWCM today, day 12 and 4 days before I *thought* I would ovulate. I'm now worried that I'm not tracking accurately... any thoughts from your own experiences?