My period is due today . Usually I start bleed immediately and I have pain in stomach and back usually .Im trying to convince. This time I'm having dizziness in morning , absolutely no pms ( back ache or stomach cramp which usually happen ) . I have some wave sort of pain which vanish in seconds in groin area . I'm feeling very tired and dizzy . But I saw spotting today noon , even by night bleeding not started . Is it implantation bleeding ? Or early pregnancy? Is it indicate I'm pregnant? Shall I test tomorrow or need to wait for more time ?