My Bf and I did not have intercourse, but vigorous fingering. Next morning I felt a little pain in my vaginal area which subsided after I ate something. His penis was close to my vagina at times so I took the morning after pill within 24 hours. I had periods after 8 days, which was one week earlier than normal and of shorter duration. 1-2 days after the periods are over, I am observing dark brown discharge from my vagina in small quantities throughout the day. It has been for 3-4 days now. Is it something to worry about?