Please someone...

My mom was diagnosed with Esophageal Cancer when I was 13. I am now 16 and absolutely petrified. I don't want to lose my mom. She had surgery and they thought they got it all, but just to make sure, they did Chemotherapy. Apprently, that didn't work. It spread to her Lumbar Spine and penetrated the bone and came back in her neck. The doctors said that they were going to try Chemo and Radiation. She went for a PT Scan and it came back clear. A couple months later she went for another one, and it was back. The Radiation didn't work on her Spine, and now she has it inside the muscle on both sides of her ribs. My friend just lost her mom to Cancer, and I am scared I'm gonna lose mine. I don't know what to do. I'm sooooo scared and have no one talk to.