Brown Spotting when AF due


Has anyone had brown spotting when Af is due after a miscarriage? I know I ovulated around the 10th Jan and AF is due today, but last night I had brown when I wiped and some today. I keep thinking Af is starting, but when I check, nope! I’ve had negative tests from 11dpo! I don’t know what’s going on 🤷🏼‍♀️.