Help! my dress is too big and I don't have any more money in my budget for alterations.

As the title says, my dress is a size too big! I bought it last summer when I was 10lbs heavier (I put on a pandemic 10lbs thanks to extra hard ciders and desserts). At the time it was a bit tight but fit pretty decent. I took it to get hemmed and get rhe straps shortened. I've since cut back on drinking and eating desserts and lost 10lbs (not really trying to), and now my dress is too big! It puckers at the zipper with a very noticeable gap between my back and the zipper, and the bust is comically large. I don't really have any more money to get it altered (I'm anticipating it will cost at least a couple hundred dollars to get it altered), and my wedding is in 6 weeks. What can I do?? I love my dress and I want to wear it for my wedding, but I also don't want to be swimming in it and pulling it up all night.