I am a 20 year old female who had unproteced sex the last day of my last period which was the 15th of the month....I started my cycle on 5th of the month...it was the longest period I had (1 week and 1 day)..I then had sex on the 20th of the month. Today is the 8th of the next month and I still have not gotten my period, but I keep cramping, tender breast and nausea, but I haven't had a period....I don't think it coming b/c my body is not producing the same menstrual symptoms as usually. The wall of my vagina is usually a darker color pink about 3 days before my cycle, but it is pink and normal...Have anyone had these same symptoms and what was your result? Also could an expert tell me if the reason for my late period is because I had a longer than usually period?