Stupid parents

Okay so this might be stupid but for me I have trouble controlling my emotions especially my anger. I also do suffer from depression so keep in mind.

I hate the lights being on in my room because it just bothers my eye idk it does i hate when lights r on they r too bright. n it makes my room hotter so my sis came into our room and left the lights on when she got something n left. I told her not to leave the lights on in my normal voice also cause I am like in a whatever mood i guess i wasn't bothered by it but I just had to remind her since we usually remind each other to turn lights off. my mom always has something to say n always starts arguments by saying something n I love her but she can be a lot. she said  " why are you mad and getting mad at mel/everyone" i don't remember if she said my sis or everyone but I came out my room and looked at her because I was confused because I gen wasn't mad at all. I replied "I'm not mad why do you always think I'm mad and why do you keep saying stuff." because like I legit wasn't mad but being told "why are you mad" gets me irritated I can't help getting annoyed easily. she just kept saying " well you seem mad and you are mad. okay I'm sorry" and I said something like "i'm not mad and stop trying top say stuff n make a argument". I left it at that and went to my room. but hold n behold my dad came home and I could hear her through the walls saying " Delilah got mad at me and she is all mad" my dad said something I couldn't hear but I know he was joking about me being mad. Now when I'm angry and crying out of fustration I tend to cut so that what I did and now I have to hide these cuts from my parents