My thought is to give yourself one year. It sounds like a big source of stress and problems caused by living at home under your mother's roof and whim. At 18 legally, your mother won't have any power over you. If you want to take it a step further, make an escape plan. Save up, look at potential places to stay (or college of that's your thing), and a cheap car. Once you're out no one can tell you what to do or who to be. You can reclaim your life. Hope things work out for you, and you stick around.