ZomBz: you WILL need breast reduction surgery. You might as well do it now and get it out of the way, reducing your size won't really help with the surgery.
You will also probably need some skin reduction, depending on your age and how much weight you lose.
But since your breasts are more because of hormonal problems then weight, no amount of dieting will resolve your breast issue. Even if you lost 100 lbs, I suspect your breasts would remain at about 80% of their current size.
Did you have that ovary removed? Are you on supplemental testosterone/E blockers currently?