Spotting since 5dpo

Cheyenne • 👼👼👼👼🩷👼💙👨‍👩‍👧‍👦
I believe I am 8dpo cycle day 21 today. I don't use opks or temp. I just check my CM and CP during my fertile week. But the morning of 5dpo I had a dream of buying tampons then started bleeding when I woke up. I am still bleeding today. It's not really heavy, and is not clotting so I don't think it's aunt flow. Just curious if it might be implantation bleeding or just a weird cycle.