I did oral sex on 17th march. He fingered me for few seconds, before 5 to 10 minutes he wiped his hand which had some precum on it and touched several other objects too. Even then I was scared to get pregnant so I took unwanted 72 on 18th march. I had heavy bleeding (less heavier then my period) on 24th and 25th. Today is 26th and the bleeding got lighter. When should I expect my next period? Also I have irregular cycle so I take kanyalohadi vati, rajpravartani vati and m2 tone syrup. And is there any chance of pregnancy still? My last period was on 28th feb.