This happens to a lot of people specially when they lose very quickly because you have not had time to adjust and learn from old mistakes.
You can do the 5daypouchtest to get you back on track www.5daypouchtest.com and then you need to get really mentally in tune and listen to your body. don't eat when you are not hungry and do not wait until you are full to stop...do not eat fatty junk foods..just tell yourself I don't eat that ...don't say I cant eat that....denying yourself will just make you want it more...just be resolved and say, I do NOT eat that ....
Drink your Water, and I think after the 5 day pouch test you will be back to the basics and you will have found your groove again.
You went though too much to let this happen....Dont wait to start, start now right this minute right this second regardless of what you already ate today.
Good luck and I hope you find it in yourself to want to finish the game.