What Causes Breast Tenderness And Stomach Cramps During Menopause?

Hi, I m a 52-year-old female, been in menopause for 3 years, last menstrual cycle was April 2012. 2 days ago I started having breast tenderness, this morning I developed strong cramps, and this evening I started bleeding. The bleeding is bright pinkish/red, not heavy. Is it normal to have a period 3 years into menopause?