I'm 19, 34DDD, want a breast reduction. (photos)

I am 19. I recently lost 16 lbs hoping to decrease bustsize, nothing changed. I'm 5'4 and 134 lbs right now. I have been busty since I went from a B to a D cup in about a year when I was 12/13. I quickly went to a DD, and then about a 1.5-2 years ago I became a DDD. I have small indentations in my shoulders from the straps, I occasionally have nerve spasms (I think, but they're super painful) in my shoulder and neck near those indentations. I'm mentally very uncomfortable with my breasts.