There was precum rubbing incident happened on 17 may for 10 sec . No direct penetration involved and I took I pill on 18 may under 24 hour. My first day of last period was 4 may and cycle is of 30 to 32 days average. After that I had bleeding on 31 may with heavy cramps and light  spotting and irregular flow in start stop pattern in brownish colour blood which last for 3 days. And the bleeding start 4 days before my actual period.As the day of exposure close to ovulation day . I'm confused that the bleeding is withdrawal bleeding or implantation bleeding. Or this a normal period with effect of I pill because my actual period also last long fir 3 days only . It's 3 July and my periods not come yet. I'm so, stressed please help me.