Hi so decided gastric bypass surgery I am currently weighing 295 I'm 18yr old female and 5'8 I am hoping after this procedure I will get down to the weight I am suppose to be which I do believe is 130-140 is it possible and how much loose skin will I have most of it is on my thighs, arms & abdomen .. Will I be able to tighten skin after or will I have to get skin removed.