Spotting?

Katie
Hello! So, on day 31 of my cycle, I started spotting - usually, my period doesn't come until around day 65 (lovely PCOS). It's been just enough spotting to notice once a day, maybe a little on the pad. Started out light pink, then brown, then red, then dark red... Anyhow, it's been four days of spotting and I have no idea what's going on. Any ideas?