Im tired of being at home?

im having problems at home, just with getting along with my family, dealing with my grandma who is really ill with dementia. my mom takes care of her. thats her job. she gets stressed out, and every day i have to hear her yell or cry over what happened that day and how bad my grandma is doing. my grades are dropping. my mom is always telling my im too tall or too skinny or whatever she says, things that i cant change. she is seriously lowering my self esteem. im 16 by the way. she is stressing me out majorly, and no matter what i tell her she doesnt listen, neither do the counselors at school. they aren't even ever in their office. i failed math bc of problems at home, and my mom just laughed and was like well we know someone in the family isnt smart. she didnt even care. i havent been eating much, bc i havent been hungry, from stress i guess, and i guess i just ran out of energy or something bc in school i got real pale and fainted.i dont know what else to do, but i hate being at home