I am 25 years old. I was supposed to get my periods on August 21st, since the month before it was delayed by a week plus (supposed to happen on July 13th but happened on July 20th) so I assumed that it will be on August 21st, however, its August 31st and no sign of it still...I have not had vaginal sex but was active and had anal on the third week of August about three times that week, but my boy friend and I washed up and cleaned the areas, used lubricants, and tried to be as careful as we could....and I tested myself this week on Monday, August 29th when I felt it should have come by now and it came negative. Please help me..I am not ready to become pregnant, marry, or anything else. I plan on becoming a graduate student next year and follow my dreams of becoming a professor...thats why I have technically not had the real sex yet as I had wanted to wait for my marriage and now I am nervous and terrified!