@Black_butler13 it's okay. I recommend listening to the song Spectrum by Boy in a Band. It may not talk exactly about how you're mother had reacted you you being trans, but the over all message is what I hope helps. I just hope you know that you being trans honestly awesome in my opinion and that you shouldn't listen to your mom. She only says those things because she doesn't understand and with time maybe she will understand. And the bullying is just a whole different ball park because the people that bully you are just trying to pull you down in to a pit of despair like the bullies before them. So I'd recommend either telling a teacher about the bullying or maybe even trying to talk to them and show them a bit of kindness. Also, don't think you ruined people's because I can't imagine someone's life being changed for the worst with you, you just don't seem like that person. I hope you don't continue to cut and I hope that you can find another way of getting the pain out that isn't leaving battle wounds on your skin. I'm also pan so if you ever feel alone on that then don't because exactly what you mean.
I hope I helped in some way and just remember you can always talk to be again if you want too. I'm a 13 year as well so don't think this is some older person who's just pulling words out of thin air because I know how you feel, not necessarily with being trans, but with the bullying and cutting.
Anyways, I'm sorry if I just went everywhere with this, but I hope you know that you're amazing and that you being trans is just awesome.