That's a lot of changes you've been through!
But most important you found the key of success to finally have a balance between being too skinny or weighing too much.
Personally I never believed into some kind of diets or some kind of exercises because the secret is motivation. It's all you need to change your lifestyle and bring something new into your life. Going to the gym do helps your body and also your health but more than that it has this power to keep the stress away or just help you whenever you have a bad day, at least this is for me.
If when I started to read the article I felt a little bit sad, now I'm happy that I made it to the end to see that you are feeling great. Congratulations on your motivation and doing the changes you needed in your life! :)