I wish I knew what to do...?

Obviously, your mom has issues, and making you go without food is a grey area (in certain states) where proper authorities should be involved. If the religion issue gets thrown again, you could always use Matthew 7:1-2 (KJV), "Judge not, that ye be not judged. For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again." As a mother, she should love you unconditionally, because God loves her unconditionally. I pray for safety around you and for God to show His way with your mother. Even if you make the choices you make in your life, God is always with you and waiting, patiently, and will meet with you no matter where you are at.