bigger boobs??

Ok weird question...... I've always been quite flat (as in barely an A cup...), but since nursing 2 kids, they've all but disappeared (except for now also having bullet nipples - again, because of the nursing) 😭 I'd always been pretty self secure about my small boobs, but now they are practically non-existent. I'm moving more and more towards a boob job once I save enough money, but I've heard that some birth control also make boobs bigger. Has anyone had this experience & which birth control?!