I know exactly what you are going through, my mom passed away from a similar disease when I was 16. I felt so helpless at the time, we had to sell the house and move to America (from Canada) cause of my dad's job. I went through four different high schools during that time. My dad never let my brother and I feel like we didn't have a mom though, and he made sure we had everything we needed for school and stuff. He spent their entire life saving to put us through college. I made up my mind that I never wanted to feel that helpless again, and that whole experience motivated me into applying to med school four years later. Things will get better man, keep your chin up.