Fat transfer breast augmentation questions almost 3 months post op?

When can I start wearing normal bras or under wire bras and not worrying about damage? 3 months? I know that weight loss can affect the shape but a Brazilian but lift is often unaffected by minor weight loss or weight gain 2-5 kilos, obviously this varies person to person, if I lose weight now (2-5kgs) I am 50kgs, where will I lose it from? An untreated area? Isn't a fat transfer breast augmentation essentially the same?