Do i have the right to be angry?

So I have an eating disorder I've been struggling with for six years. I've gotten so much better but it's still a journey.

My mother denies the fact that I have one and says "it's no be deal just eat more so your not so skinny" or "oh no you lost weight you need to eat more today it makes me feel bad."

And it's ridiculous to me. She refuses to acknowledge how big a struggle it's been and how much it affects me.

Her comments have made me so upset I cried before and she still "didn't see why I'm so sensitive or the big deal."