Take heart. I'm in a similar position having to start from scratch with my quilt top. Had to rip everything apart, soak the muslin-backed feature fabric & start from the beginning. Not only did I do something wrong, I didn't even know I was doing it wrong. Wasted a ton of time & money since I didn't realize you need to pre-shrink Wonder-Under before pressing it to the first fabric so it seized up hours after I had sewn everything together. What a mess!
Take the night off & start again tomorrow. You'll get it done.
