Spotting or not

Hello po, Question po. Yung period ko sana is mag start last Jan 12-15 pero wala po g period and 2 days late na ako. Pero during ng 12-15 may spotting as in a tiny bit lang na parang drop lang sa panty and from 16 and today meron pa din spot drop pag nagwiwi ako and since jan 12 i dont feel well na. Dipa po ako nag PT not sure when ako mag PT. Any advice po kung implantation bleed po ba ito?