Fuck your mom, bro. You need to set her straight. Write her a letter if you have to. Ask for love and patience. Let her know there is no "hurry up" with your speech. She can be supportive or be a bitch -- her choice. Also, this is your only life. There are no re-dos. You will probably stutter for the rest of your life. Now is the time to learn how to deal with it. It will take work. You will need help. Mental health services are your friend. Speech therapy is great and recommended but your mental health must be part of the equation. You deserve someone who is patient and champions your best interests.