im on the pill have bin for almost 2 years. started having dark brown spoting 3 and a half days ago. supost to start my period 2 days ago still brown and very very lite just using panty linners and only changing them for hygenic reasons not because they are geting full. culd i be pregnant or culd it be stress? there is a chance of pregnantcy because i did have sex with out protection. i am very regular about my my pills being taken at exactly 9pm ive got an alarm on my cell which i always have on me. my flow is usualy heavy and lasts 5 to 7 days. im still geting all the regular symptoms like sore body mood swings extra tired except my nausea is realy bad ive never vomited because of my cycle but i did the second and 3rd day in? im 21 5'5 about 140 never had a light period befor