I am 9 days late for my period. Since coming off the pill 13 months ago, I did have some muddled cycles but always with a bleed normally lasting up to 7 days. I did go to the Dr and was referred for a ultra sound, the results showed everything was fine. For the last 2 months my cycle was spot on 28 days. I have taken 3 tests which have come back negative. I have had light spotting tonight. Does anyone know what could be going on.