I Have Buldge In My Back, Mid Spine Area. I

i have buldge in my back, mid spine area. I am having frequent sweating, extreme tiredness, I have lost 28lbs in 2 months and nauseous when I eat. I can eat very little and have to force myself to eat. I have two grandparents that passed away from bone cancer and an uncle that passed away from a brain tumor. Is it possible I have cancer.