Myself and Mrs. Bugzy, I have that body, too. I'm short but large framed. In college, I got down to 118 pounds, my face was sunken in, but I had to squeeze myself into a size 12...the smallest size I have been since I became an adult. Those charts are goofy.
Evenkeel, you have done magnificently well! Don't beat yourself up over the fact you can't do some things that others can do. You know, if I did what you are doing in the gym and such, they would be carrying me out on a stretcher! I do keep active and am doing well with the fibro pain under control and that's the bottom line for me. So just do what you can do comfortably. It will keep you healthy and save some pain for you. Congrats on your accomplishments so far. That's wonderful!
Sherrine