I had unprotected intercourse on day 6 of my periods. Also took unwanted 72 the same day also had withdrawal bleeding for 2 days after 6 days my periods are irregular too i'm having scanty brownish cervical mucus from the last 3 days and also having periods like pain in lower back having acne too and i'm worried is it because of unwanted 72 can it cause scanty periods? Nd also any chances of pregnancy? My periods are generally irregular and longer than 36 days to 58 days.