So I've lost about 25 pounds since around mid May. I'm 5'3 and 20 years old. I was weighing near 155+- a few pounds and am now 134. I'm really starting to get nervous that as I get smaller I'll start to get loose skin. I don't have any as of yet but I have some stretch marks since I got so big in college. Any thoughts or advice? Also my stomach still looks pretty fat to me and is no where near flat despite weight loss. Any advice on that as well?