How long is ovulation bleeding SUPPOSE to last?

I've been spotting bloody stringy discharge for the past 4 days now followed by a few other symptoms. The crazy thing is that I'm not ovulating nor have I ovulated yet. I'm only on CD 10 so I'm just wondering if this is normal. I usually only spot the day of ovulation for about an hour with pinkish blood, yet this isn't even blood. Tbh, it looks like I'm miscarrying because of the weird things that are combined in the discharge but I took both an OPK and hpt, both negative. And AF only ended 12 days ago.