Ehlers-Danlos and skin tightening? (photo)

I have a autoimmune disorder, ehlers-danlos syndrome type 3. It makes my skin and joints stretchy & hyper flexible. What would the best type of treatment be to treat sagging skin and to reduce fat? Ive never had a child (24 yo) & yet my tummy hangs as if I have for years. That is my main area of concern. Ive worked out and watched what I ate for years and it still hangs so much. I’ve recently lost weight (35lb) and I do plan to lose about 15-20 more. I’m currently 5’8 around 180lbs