Hindi ka nag-iisa sa yan, a few of us moms experienced the same thing, parang light spotting before getting pregnant talaga, so nakaka-confuse! Best approach is mag-take ng pregnancy test na, especially kung alam mo na fertile window mo, kasi ang light bleeding bago ang actual pregnancy is possible but you'll only know for sure with a test or blood work from your OB. Fingers crossed for you, sana third baby na ang result!