Panicking about my stupid wedding dress! Need advice 😩

So I’m getting married next Saturday the 16th.. I picked up my wedding dress a few weeks ago after having alterations, and I was so excited because it fit perfectly! But I tried it on again tonight, just to make sure the undergarments I got to wear worked with the dress, and the fit of the bust is all wrong now 😭 I thought it had gotten deformed because my FH had HUNG A MIRROR right over my dress where I had it hanging on a door, flattening it out. But once I looked at it more, it just looks like I lost like a good 2 inches around the bust, and that’s why it looks the way it does 😩 I never expected to change that much in just a few weeks!! I’m on the heavier side and of course if I had to lose inches it would be around the bust and not my midsection. Now I have to scramble and figure out how to tighten up the bust.. has anyone had any luck just safety-pinning something last minute without having to take it to a seamstress? I already spent $400 on alterations, I can’t really afford to spend another fortune to do more super last-minute alterations 🙃