So in February an unexpected medical issue came up that has resulted in me losing a significant amount of weight (25lbs) in an abnormally short amount of time. We ordered our dresses before this happened. When the dresses came in (like, 2 months ahead of schedule) I had already started to lose weight, but the dresses ran small so it still fit great. Fast forward one month to our first fitting (last week), and by then I had lost 21 lbs. The dress was loose, but it wasn't too bad and the bride told me she was fine with how it looked as is. The only alteration any of us needed was to shorten the straps (which the bride offered to pay for). We agreed not to take in my waist or anything because at that point I was getting healthier and the rate of weight loss had slowed, so we figured it would be ok.
That was a week ago, and our second fitting is on Monday. It turns out it hadn't slowed down as much as I thought and I've lost another 3 lbs and now it will be noticeably big. With all the medical bills coming in, I truly can't spare a dime right now and the bride won't pay (I didn't ask her to and I wasn't planning to ask her, but she preemptively told me she wouldn't). Financially, I'm out of options. My parents are helping me pay my medical bills and I can't ask to borrow money for this as well.
Sorry for the long backstory - I just wanted to explain that there's a good reason why I'm resorting to asking this question: Is there a good method to safety pin or sew portions of the dress together to make it fit a little better? Like under the arm so it isn't visible? This isn't really a form-fitting dress. It has a fairly fitted top, but it blends into a poofier skirt. It would be easy to hide a safety pin in the skirt portion, and I'm thinking I could do another one or two under my arm so it's not visible.
Has anyone done this before? Are there certain types of pins or placements that work better than others? I know BMs are supposed to pay for their own dresses, but the past few months were such a surprise that I couldn't have planned if I tried.