Ttc. very faint pos preg test last night. darker this am.now bleeding pink/cramping.different then menstral bleed.mc? or prob not preg to begin with?

Positive testing: You do not say if you already missed an expected period. Be that as it may, a positive pregnancy test indicates conception. A false positive can happen but it appears as if yours indicates conception. Bleeding could be for a variety of reasons, including miscarriage, implantation, cervical bleeding etc. see how heavy the bleeding becomes, or if it stops altogether. Sometimes, patience is a virtue.