I am 21 year old. Me and boyfriend had unprotected intercourse on 6 th day (25th april) of my menstrual cycle.(not penetrated not ejaculated ). But had doubt because of precum, hence I took unwanted 72 within 24 hours (26 th april). My usual menstrual cycle is of 30 to 37 days. I had brown spotting after 9 days of taking the I pill and it lasts for three days. I had tested using prega news two times one on 21 st may and second on 14 th june. Both are negative. Today is 17 th june, still I am waiting for my menses. What should I do? Now its been a month a missed my period? Should I consult a doctor or for how much time should I wait?