Non-Surgical Options for Skin Tightening During Massive Weight Loss

I am in the process of losing a lot of weight in an unhealthy and pretty unmanagable way. About 5-10 pounds a week for the past 2 months. I am being diagnosed with some sort of autoimmune problem with my colon, but they suspect Chron's disease. I hate all this sagging! Luckily I have lots of extra weight to lose but I'd rather be fat than have all this skin! I know I'll probably hear about the wonders of having a frankenstein makeover which will cost more than my cars and a year's house payments. I have bagging in my arms, stomach, inner thighs, and jowl. I imagine it will only get worse as I continue to drop this weight. But what I'm looking for is: What vitamin supplements can I take (right now I'm only able to eat chicken and turkey without getting sick) What exercises can I do? Are there lotions I can rub in? Is there special clothing that will help aid the return of eleasticity? Other info you might need: Gender : Female with 2 kids, Age: 32 Starting Weight: 238, Current Weight: 203 and dropping daily. Any help would be appreciated! Thanks, Nicole