Having owned a facility where we did weight counseling, we often found the women who were most concerned about the visual side, rather than the health side, of weight loss were the ones who had doubts about how attractive their husbands found them to be. You said your husband had no problem with your having the procedures, but my question would be whether you think he wants you to have it because you're not attractive to him. This may take some deep and honest evaluation on your part. If you do this just to please someone else, you may have some repercussions. What if he doesn't respond as you expect? Will you then do just as your doctor warns is possible? Will you want to do more until you reach that perfection you want from someone else? And, if he responds with alot of enthusiasm, will you wonder if he JUST loves you for your body and not yourself? This may not pertain to you at all, but I believe it is worth looking at before you make a decision.
In general. If one lost a breast to cancer, I do not believe Heavenly Father would be the least bit opposed to them having surgery to rectify a loss; If one had breast surgery just to be more alluring to others - they might be placing too much emphasis on worldly opinion and run the risk of getting caught up in something that is detrimental to themselves. As with most things, it is the intent that is most important.