Boobs

My boobs are a 36G and are really heavy and over the past few weeks I've noticed they've gone really saggy. And I mean like really saggy!! My confidence is through the floor and I don't know what to do! The only thing I've read I can do is surgery...and that really scares me because of the scarring and I've seen so many people have things go wrong (wonky boobs etc) I'm only 17 too!!