Hello,
I don't want to upset you but I had to post. I really don't think this dress is suited to large breasts at all.
Scoop necks and v necks are better at giving balance to the upper body if you have large breasts.
Also it is quite short and with big breasts I think it will add to it looking very "heavy" in the top half.
Tbh I don't think this dress would be very flattering to many people. Only thin women with small breasts.
If you don't have time to shop for another maybe you could try it with a cardigan? This might help bring some balance to the "top heaviness"?