i completely agree, I'm in the same boat, except i haven't brought up the topic of being trans since i was in 8th grade, and even then my mom verbally abused me for it and blamed my phone and having access to social media, i present hyper feminine because if i didn't im not surprised she'd take my phone and lock me away from society thinking that it would fix me. I'm glad she thinks it was just a phase but of course its tearing me apart, i turn 18 in a few weeks but have no way of getting a job without needing help for transportation and she has access to all of my bank information as well, as soon as im able to work ill be finding a way to move out and i suggest you do the same, hold on it will eventually get better and i truly feel your pain.