Given your complex medical history I strongly suspect there are several causes of your various current ills. Steroid use could account for much of this, and may also have suppressed cortisol production somewhat. The sum of this is sometimes a seeming change of body morphology such as you describe, and it may require a reworking of your medication schedule as well as the tests prescribed (including the brain stem scan). Diabetes probably also figures into this in some way, possibly more than one. Between all these things and early menopause I can see where a lot of this could happen, hopefully resolving to a great extent with proper medical management. I think it would probably be helpful for you to either have an endocrinological consult or, if you're being followed by an endocrinologist, to request a second opinion if things don't improve via some concrete changes in your medications and the ruling out of any physical obnormalities of the adrenals and the pituitary gland.
I hope this is helpful to you. Good luck with this, and please follow up with us here, especially if you have any additional information or anything new to report.
John Kenyon, EMT, CCT
Non-invasive cardiology tech, Emergency and Critical Care technician, Critical Incident Stress Mgmt. specialist