I was diagnosed with binge/purge anorexia. hows that different from bulimia?

Definitions: Bulimia nervosa is also an eating disorder. Those with bulimia nervosa usually binge and purge-purging means they force themselves to vomit. A pure bulimic would not binge eat, they would just purge after meals. Bulimia nervosa and eating disorders in general can be quite severe and even fatal. People can die from eating disorders which is why treatment is vital.

Both are significant problems. Please have a complete physical exam to know if you have a physical illness. Then see a clinical psychologist with expertise in multiple types of psychotherapy for help coping and a Psychiatrist for medication. A support group can be helpful.