My name is Blessing Adams, i had my period on Aprial 23rd 2012, my circle has always been 27 days, and the last time i had sex was on Sunday May 6th, today is 25th and still no period, except for a very light spointing. I intended to take a pregancy test today, but i am filling a some pain round my waist , please tell me what else can delay a menstral flow if not pregancy?