I had protected (implanon & condom) sex on the 7th & 29th September. My period was due around the 24th .. it is now the 12th October and it still hasn't arrived. This is the first period in 10 years I have missed, although since being on the implant (march 2011) my cycles have been crazy irregular.
Today I have been getting an amount of brown discharge, which I used to get quite often when I first went on the implant. I had been feeling a little crampy, which made me go to the toilet initially. Last week, my nipples were quite sensitive to the touch. My breasts themselves were not sore.
I had a pelvic U/S on the 28th Sept (day before second amount of intercourse) and was told my endometrial/uterine lining was only 4.9mm.
Based on this, what is the likelihood of this brown discharge being a sign of pregnancy?