Akala ko rin yan dati sis, kaya nag-worry ako ng bongga! From what I gathered, implantation bleeding usually happens around 6-12 days after ovulation, so super early pa lang, like before or around the time ng missed period mo. A few of us moms tried tracking it carefully, and honestly ang tricky lang kasi parang light spotting lang talaga, nothing heavy, so madaling ma-confuse sa regular period din. Best talaga na i-confirm with your OB kung ano exactly ang nangyayari, especially if concerned ka na, kasi they can do blood tests para sa hCG levels na mas reliable than guessing lang from spotting! Fingers crossed for you na good news ang makukuha mo soon.