Strapless wedding dress bust bulge

I bought my wedding dress about a year ago. It’s a zip up strapless gown & it fit perfect! I just tried it on again today to have bustles added & it seems I’ve lost weight. The bust area bulges. Unfortunately my seamstress says she can’t take it in because of the way the dress was made. I don’t have a lot of time . Wedding is next month. Is there any easy fixes ? I don’t want to use tape because I’m scared to sweat it off 😩🤣