DOCTORS/NURSES HELP!! Endometrial Cancer, AFTER surgery AND radiation therapy.?

52yr diagnosed with cancer, did the surgery, did radiation therapy, declined chemotherapy. it has been 19 months since last treatment. she has lost weight, has a loss of appetite, weakness (cant go up stairs or walk with out stopping). She says shes tired from work (7pm-7am 3x a week, 3-11 every other weekend) It seems like she is in denile of having cancer and feels shes ok and that she is just tired from work. She has also been bleeding and uses a pad (i am told). She wont let her husband go to doctor with her, when she came home she said the doctor said she has dementia? is that true or even possible? what else could it be? HELP!!!