I suggest you drink more water and do something different, don't think about food at all - it will pass.
Its a habit - after all you have been eating for years. Most habits take at least two weeks to change, so just keep going. It gets better.
The first few days really are the toughest. I had random foods popping into my head that I normally wouldn't have dreamt eating. Ketosis makes things easier. It might be tough now but eventually you will get into the habit of not eating. You will develop a routine. Take one day at a time. You're going to be over the moon when you stand on your scales at the end of your first week.