lost weight loose skin

so I lost alot of weight in a year I went from 185 ish to 128 and now I have loose skin mainly on my boobs u went from a Victoria secret side DDD to a D i hate how my boobs look sometime like you can just push the fat and boob stuff back from the front and have a lot of skin in your hand. anyone know how to fix this? I know working out but with.my Heath conditions it's hard to work out..