Help!

Ke

I’m having random spotting that lasts a couple hours then goes away. The past 4 days I’ve had off and on spotting. First day it was light red/pink lasted an hour, light enough to only wipe and spot the panties. Next day I got brown spotting, just as light. Next day, nothing! Today, dark brown almost blackish spotting! I’ve had watery CM and thought I was going to ovulate son by nope. I’m tracking BBT and using opks and so far no sign of ovulation. I’m CD17. Any clew way this could mean?