Alterations

Your dress is just gorgeous!

I think your best option is to have your seamstress put padded cups inside your dress, and don't bother with a bra - except possibly a stick-on chicken fillet type thing for the front?

Honestly it looks beautiful how it is and I don't think you need to do too much to it for it to be just perfect.

It depends on what you want. I was adamant that I don't want to look any bigger than I am. No cleavage, no pushup, no extra giant cups. Is there boning in those seams? If so, your top is similar to mine. They first suggested adding more cups, but I explained that I want it to fit me, as I am, so we went the opposite route--they're taking in through the seams and actually adding in new, smaller cups as the ones there were too big! This is definitely pricier than just adding in cups.

There's nothing wrong with wanting to get more oomph though, and if you think you'll gain wait you'll want to wait until that's all settled before alterations anyway!

I agree with this!

Honestly, I think you have a great body for this type of gown. The deep plunge gives you shape without making it look like you're stuffing or trying to look busty.

The only thing I honestly see is that the front should lay a little flatter to your chest, which I'm sure they will take care of. Skip the bra. If you want some structure so you don't feel like you're flying free, you can have the seamstress put in a molded cup that will just make you feel secure.