I don't know if you'll actually ever read this, but on the offshot that you do....
Stay strong. Eating disorders are an illness (despite what others may think). You did the right thing by going to your mom for support. I'm sorry she didn't support you. I went through the struggles of an eating disorder, too. I struggled with it for 2 years before finally seeking help. Now, 4 years later, I am finally to the point where I am moving on and living life without the eating disorder.
Like I said, I don't know if you'll even see this, but if you do.....I saw that you are from Minnesota too. Park Nicolette has an amazing eating disorders treatment center called Melrose Institute. I strongly suggest that you give them a call. I had tried so many things and they were finally able to help me get better and move past my eating disorder. Stay strong, life will get better and you will beat your eating disorder.
Family are too close to you and they are prob scared and just show it in other ways because they dont know what else to do. somethimes the best thing to do is get outside help from a 3rd party. Good Luck!!!