I am 12 years old. I'm not some spoiled kid who wants to complain about not having a new iPhone. I have real reasons. My single mother, 2 brothers ,and I move around every 6-9 months. I just got back from Texas 7 months ago. We moved out of are grandmas house into a 2 bedroom condo 6 months ago. I share a room with one of my brothers (I am used to it). My mother gets stressed out because we can barely afford the basics. We have a couch but I have been sleeping on a blow up mattress for 6 months because we can't afford beds or drawers. We can barely afford food.

I blame me for her stress cause once and a while she gets angry and pushes me into a wall, punches me to the ground, etc. She's calls me things that I have never even heard of and I'm lost too. I think that I ask too much of her only because I'm a preteen. I am so depressed that I began to cut till the white meat shows, I wear baggy clothes so she won't tell me that I think I am grown. My life is surrounded by her.

I am doing/asking this for her and me. For my health, and her pressure.

Sweetie you need to talk to an adult that you trust and report the physical abuse that you have described. No matter what the circumstances, your mother has no right to shove punch or otherwise call you names. It's against the law and you need to report it. Talk to your school counselor, teacher, coach, clergyman etc.
They will help you and your family

Definitely talk to your teacher tomorrow. All teachers in the U.S. are called "mandatory reporters", which means they will call Child Protective Services. You do not deserve to be hurt physically or mentally. Tell your teacher in the morning and let us know how you are doing.

If you are really being physically hurt report it, that does not mean you will go into foster care. They may, investigate, require mother to take parenting classes or other things.

Remember, of course, normally in foster care you will have no cell phone at all, since that is not paid for, and you will have just basics. Share a room with someone may be common also.

Sleeping on a blow up mattress, sharing a room, moving around, stress from not having enough money. None of these is a reason to go into foster care as that can actually be worse.

But physical abuse is another issue. This needs to be stopped. So you need to talk to a school counselor.