The thing is, if you readily accept that you 'may fall off the wagon' that already affirms it in your mind that you WILL fall off it. Start telling yourself that you will NOT. I'm a great believer in positive thinking.
I
know I will NOT fall off the wagon of my diet (even though, naturally those thoughts do cross my mind sometimes; but it's a knowing, rather than a guessing).
I'm at start of week 6 and have lost 15lbs so far. I have not wavered in my resolve and do not eat any carbs or sugar. I want the goal too much and have developed that self-belief again. I CAN do this. I'm not on any abstinence plan and am not meticulously calorie counting either. I trust myself enough.
I guess that really is the issue. TRUST. ... Things I know I can't be trusted with - I don't even touch and don't buy in the first place. If my OH wants something out of my personal bounds - he has to get it himself - that way it is not 'mine'. It's his, and ONLY his because HE bought it. It's a nice boundary to have, even though we share the same money. The money principle doesn't matter.
If the serving size is too large on a packet of something I can actually have - I don't buy it. Buy the smaller size instead because I know at the moment I can't trust myself to leave 'a bit in the bag'. When that trust comes back I will, but until then, no luck for me!
Maybe this will help a little. Just start setting up boundaries of things. After about a week of keeping within those boundaries things will feel a little more habitual and routines will set in. Have a clear time for breakfast, lunch and dinner. That is the most important thing.
Take care of yourself first and most of all. I hope you feel better very very soon. xx