It is some what difficult to give you a definitive answer without the benefit of an examination but after reviewing your photos my recommendation and findings are:
1. Considering you small stature you may well be covered by your insurance carrier for a removal of
approximately 500 grams from each breast to take you down to a B+ or C- cup size.
2. Your symptoms are well documented and a history of your multiple symptoms associated with this condition such as: Bra strap irritation, back problems, neck strain, rashes beneath breast and most importantly a diminished overall activity level must be included in your prior authorization letter.
3. A well documented attempt at improving the above noted symptoms for at least one year.. including: Treatment of rashes beneath breast, physical Therapy for back problems, medication: muscle relaxers, mild pain pills (tylenol) would also be extremely helpful.
4. My recommendation would therefore be a bilateral reduction of approximately 500 grams with a movement of your nipple/areola complexs more toward the midline without totally detaching them so as to preserve feeling and the ability to breast feed later.
Be sure to seek the advice of a board certified Plastic and Reconstructive Surgeon. Good Luck