“Melissa”:, first, welcome to The Collective. (Avoid making puns, please. I’ll explain why, later.)
I’m sure you remember the story of, The Ugly Duckling, and how it had a happy ending, eventually.
But to answer your Q definitively, you need to first ask yourself, honestly, if your desire to be larger is to impress yourself, or the men in your life?
For some guys, smaller is sexier. Personally, I’m a “leg man,” and am unimpressed by boobs (we have plenty of those, working in the US Congress).
If you get a larger set (via surgery) and all of a sudden you are surrounded by a bunch of dudes who didn’t notice you previously, then you will know that those guys are very shallow, in that the only reason they are coming around, is for nursing privileges.
Let me suggest, respectfully, that before you actually do anything at all to change your appearance, that you talk to a psychologist, to make certain what your overall goals are, and why you feel as you do.
Then, once you are certain of your feelings (and only your feelings), then proceed as you think is best for you and your situation.
Just remember that whatever you choose to do, it should be done only for you, and not some shallow others, OK?
My best wishes for you, whatever path you choose.