How to deal with loss of appetite?

Hey guys. I've been really awful lately with trying to eat. I know I need to eat but usually I dont feel hungry. It's gotten to the point my stomach is killing me, I feel my legs and arms go numb too sometimes. I am a bit scared. I think I'm gonna die.

I guess of stress of eating also just makes me not want to eat. My mom doesnt really know how to help and is quite toxic and when I was eating cereal this morning she kept scolding me how I dont eat enough as if I'm not aware. Also telling me things about how weak i am. Making me more disinterested in my meal. I ended up crying and barely finishing my cereal. It's around lunch time and I'm not sure what to eat right now.