There is nothing stopping you from starting over. Do a "pre-op" prep diet, then fast for a day or 2 pretending you just had surgery, then start your recovery post-op diet from scratch. It's hard, but it's totally doable, seriously NOTHING is stopping you from starting over.
Also check into Intermittent Fasting (IF), the science is sound and, it's free. There are a few of us on here doing it and I can say with 100% certainty that it has helped me out drastically. I was getting stalled hard around 230-235. I picked up IF and I'm down to 210 now... it's gotten a bit harder overall, but, 20-25 lbs of extra weight loss I can attribute to IF.