I've been on the pill for two years. Initially after getting on them I had regular periods, just slightly less heavy. Last month it was basically just dark brown blood, not enough to ever fill a bad or tampon. Started placebo pills Sunday and period is due today, and last night I started with some light pink spotting. I've been cramping terribly, sore breasts and dizzy. See the pic for the sorry excuse of blood so far.

Is this normal? Do I need to see a Dr? Haven't taken a test today but did last month and 3 days ago and they were all BFN. Is this what happens after being on the pill for a long time?