Hey silentone,
I can relate with your concerns because I once felt the same way. The reason I waited so long to transition is because I was worried about my family (specifically my mom). Putting my mom through this was one of the hardest things I ever had to do. We are incredibly close and it's really hard for her to deal with such a drastic change. However, as much as I love my mom, I couldn't live a lie for her. I would do anything else for my mother. I'd even take a bullet or jump in front of a car for her. However, to live a lie and not transition was too tall an order for me. Even though it seemed to be an impossible feat, she is coming to slowly accept it.
I'm not sharing this to influence your decision or sway you to transition. Everyone's situation is different and your situation can greatly differ from mine despite our similar concerns. I'm sharing this so you know there are others who have been there and have come out okay (semi okay in my case). Many times we look at transitioning and only see the challenges involved that it becomes difficult for us to see a potential good outcome. It doesn't always have to result in a bad scenario even if things are difficult at the outset. From the sound of your post, it appears that your mom loves you very much. According to what you wrote, she wants you to get help for your conditions and find peace in your life. That sounds like someone who wants their child to find happiness. She may not like you choosing this path as a remedy for your problems, but perhaps her love for you and desire for you to find peace will help her overcome her concerns. Again, there are no guarantees and I can't assume your mother's feelings from one post, but isn't there a possibility for a positive outcome?
At the end of the day, you have to do what's best for you and your family. Some have found peace in not transitioning and have lived successful lives. If that's possible for you, then that's great. Whatever decision you make, I hope it leads you to happiness.