Help me!? I dont know what to do anymore :(?

So, My Step dad has just been really nasty to me lately And makes me clean my room when its not even dirty, But a few days ago I had to take a shelf out of my room which had alot on it and he got so mad at me and took my phone away for 2 reasons 1. cause my room looked like a tornado (but i just had some books in a pile and dog stuff on the floor in a corner and 2. Cause I thought of just me this summer :( But I dont see that at all :( I only went to a few friends houses this summer havent gone anywhere and Cleaned the house everyday! How is that thinking of just me. AND my mom and him say i have an attitude. I might have well i know i have but im trying to stop its just im 13 and i think im about to get my period so ive been really moody and i havent felt well at all. But ive also have had an attitude because this is what my mom does : So she works as a deli manager and whines about her job and doesnt see what benifit she has with me and my brother but we CLEAN THE HOUSE FOR THEM ALL THE TIME!! They dont ever see! Anything! And my mom sometimes has a really bad day and just yells at me at being a spoiled brat and am the most selfish conceited thing she has ever seen :( And every night I cry myself asleep cause i feel so bad and selfish but im not! I know this because i never ask for anything and when my friends ask to hang out I always have to say no cause i am cleaning the house/kitchen even my brother sees it :( I just dont feel loved by my step dad or mom anymore only my real dad and brother. And all my step dad is sit in a chair all day and his job is soo hard ooo whatever :( i just dont know anymore i cant live like this but i cant just talk to them! My parents arent abusing but they never understand and just think of themselves. Sure they buy me clothes and food but my mom always mentions prices to me like That bra cost 10 dollars dont you lose it or even stuff i get for christmas. Does anyone else live like this? PLEASE HELP ME im so sad