I've been having spotting for about 4 days now, dark brown, the first time i felt it coming down & it wasn't much, the next day only when i wiped & the other two days (including today) feels like the last days of AF when you barely spot. I'm worried because i had a miscarriage in June. I'm 6 weeks tomorrow.. You guys think it's a miscarriage or "implantation"? please help :( & thanks in advance