shouldi - I'm sorry you're not feeling well.
Breakfast: 2 small quiche/muffins
Snack: 1 small quiche/muffin (hungry)
You shouldn't be hungry by now. If you are, this suggests that you're not eating enough fat.
Lunch: smoked mackerel and lettuce, dressing
This doesn't sound like much - but I hope your dressing was an oily one?
Snack: boiled egg with some sausage meat (a la scotch egg)
Again, you shouldn't need to snack if you're eating enough/enough fat.
Dinner: Total FF yoghurt and raspberries.
This doesn't sound like enough food!
It looks to me like you're not eating enough. You probably aren't eating enough fat either, and there isn't much veg going on. A dinner of only yoghurt and raspberries isn't 'normal'!
How much booze is involved in your day, and how much water?
Are you honestly following Bootcamp rules?