The advice to avoid eggs has long since been disproven, butterfly. You can eat as many as you want! They are a great low carb food, containing protein and fat as well as vitamins.
GOML - don't be despondent. One thing I have learnt over the years is that weight loss isn't linear. Being good on day one does not always mean that the scales are you friend the next day!
And, sadly, 'bad' behaviour will impact on the scales.
The overall pattern of loss is what you should be aiming for.
On the low carb site that I use, one piece of advice was to weigh daily but to take the average reading for the week.
Daily weighing keeps me focused, but you do have to accept that the scales will go up as well as down - and sometimes for no apparent reason.
For example - last week, I was really shocked to see the scales drop right down to 10.11 on Tuesday - by Saturday they were up to 10.13! But the overall loss for the week was 1lb. Not massive, but still a loss.
This morning, the scales were already showing another pound down.
You do have to take the longer view!