Hello and thanks for your question.With regard to how much weight to lose, you need to consult with a nutritionist.Plastic Surgeons are trained at, and skilled at, working out solutions for your breast size, but they cannot predict the best weight for you, or how much weight loss will come off...
It would be unusual for your to have pain 3 months after reduction surgery. Most patients find this surgery to be quite easy to recover from and very few have any discomfort after 3 months. It would also be unusual to have muscle soreness after a breast reduction because most surgeons are not...
Your procedures are commonly done at the same time under the same anesthetic. But if you were dong them separately and was in my office, I would have no problems proceeding a week later... once it was clear that you did not have any complications from the liposuction.