I Have Had Breast Cancer 2006, Had My Ovaries Out

i have had breast cancer 2006, had my ovaries out 2010. chemo, radiation, 3 yrs tomaxifen, 5 1/2 yrs Famera (ended in 2015) Never had any issue except mild Osteopenia. Today I am having bleeding. Never been an issue. Will follow up with my Oncologist and Gynocologist tomorrow. But any ideas what it could be? I am terrified it's cancer