I feel ugly all the time

I have so many issues with my body. I am 5'3 and 112 pounds but I am flatchested, have a horrible stomach which sticks out as I have inflammatory bowel disease and I look like a 16 yr old kid even though I am nearly 33. I despise how I look. Don't have any photos of myself as I look God awful in them and I wonder if feeling like this will ever pass?
Socially because I look so childish in the face and body, men see me as a kid sister and people younger than me treat me like I am a teen. How can self image be improved? How can I accept that I am ugly?