Oops-cut the back on the fold!

Alright, I'm looking for creative ideas to salvage this dress. I cut out my pieces and then realized I cut the back on the fold & the front along the selvage. So if I switch them I'll have a low back neckline & a very wide front neckline. What would you do? I was planning to do the notched contrast neckline, so I have that fabric, though I'm pretty sure I will need to gather or pleat the front somehow to keep the dress from totally gaping. I'm using a remnant so I only have a few inches of my main fabric left. Any fun ideas? Thanks for any suggestions! Michelle