Nak, kahit negative ang PT mo, mas better talaga na makita mo ng doctor agad, two months delay is really something na kailangan ng professional check-up, hindi lang PT. May maraming reasons bakit pwedeng mag-delay, at only a doctor can figure out kung ano talaga ang nangyayari, lalo na habang gumagamit ka ng pills. One of my mum friends had a similar situation, at ang OB lang ang nakatulong sa kanya properly. Please don't wait, book an appointment na with your gynecologist, okay?