My counselor was going to report it but I begged her not to. I was scared I guess. She gave me the number to Mobile Crisis and told me to call them and/or her if my mother hits me again.
What were you scared would happen if the counselor reported it?
I think the counselor was wrong not to report what you told her, she was obligated to report it--you are describing child abuse.
I'm not sure you should wait until she hits you again before you report it, her abusive treatment, of various types, seems rather continuous and there is no reason you should go on living with that.
Do you still see a psychiatrist for the Lexapro? If so, go to see that doctor and ask him/her to report how your mother treats you, if you don't want to report her to CPS yourself, although you certainly have the option of calling them yourself.
I think you need to report what is going on so that you feel empowered and not trapped in that situation for another year. I think that will help to lessen your feelings of depression. And your mother needs some external control, like CPS, to keep her from at least physically abusing and threatening you. And she likely would benefit from therapy to help her deal with her feelings toward you and her verbal/emotional abuse, and a court might order such treatment.
If you report the abuse, or someone does it for you, you can request to be legally removed from your home, perhaps to live with your grandmother, or even to go into foster care for a year if there is no option of living with a relative. Either of those alternatives would probably be better than remaining where you are.
One way the effect of emotional abuse is evaluated is by the impact on the child. You've already made a suicide attempt, and you say you feel your current depression is increasing. That's why you have to act in your own best interest, and report what is going on, and how it is affecting you, and stop trying to shield your mother from the legal consequences of her abusive behavior. All that is likely to happen to your mother is that she'll be told to stop physically abusing and threatening you, and possibly ordered to attend parenting classes or go into therapy. But she'll get the message that her mistreatment of you is wrong and unacceptable. And the benefit to you would be to help you legally get out of your house and be placed elsewhere until you go off to college.
You have the legal power to curb your mother's abusive treatment of you, and to alter your current living situation, and I think you should try to use it.