I have 2 family members with colon cancer

My dad died when he was 42, of lymphoma. I was 15 at the time. Last May 14th, my only sibling, my 57 year old brother underwent emergency surgery for a perforated bowel. It was stage 4. He started chemo treatments in June. July 5th, my 80-yr. old mother had a heart attack and had to have stents placed, 3 to be exact. She seemed to be OK and was doing rehab when she started passing out and feeling weak. In Oct. after the dr. had ordered another heart cath, they found her hemoglobin level to be at 7. She had a transfusion and an EGD. They found 8 duodenal ulcers. She is on 3 anticoagulants because of the stent placement. Since then she has had 3 more transfusions and had occult blood in the stool. Because of severe diverticulitis she hadn't had a colonoscopy in 5 years. They tried to check the colon by having her swallow a capsule with a camera in it, but it got stuck. Last Tuesday the doctor performed another EGD and a colonoscopy using a pediatric scope. He found that the ulcers have healed, but he also found a tumor in her colon. He believes it is stage 1 and hasn't metastasized and wanted to do surgery within 2 weeks. But after he had talked with her cardiologist, he does not want to have her off of the anticolagulants for at least a year after the stent placement, which isn't until July. So we are playing the waiting game. I am her caregiver, though she still lives in her own home. She is scheduled to have another transfusion on Thursday. I feel so helpless, with both of them. It is so hard to just watch and not be able to do awhole alot. I have faith in God and so does my mom. Right now I just feel-------Helpless