Spotting/light bleeding

Anyone experience spotting/light bleeding 10 days past last period. I am not ovulating, I confirmed with opks. This happened in my last cycle too, I lightly bled for 3 days and then, according to the glow chart I ovulated days after the bleeding and had period 14 days layer. I’m on my second day of light bleeding, when it’s technically supposed to be my fertile days. Sigh. Let me know if anyone has gone through this! Thank you!