Please can I point out that it's low carb, not no carbs!
3littlefrogs - I don't want to pick on you, but you say:
"Breakfast: Porridge with skimmed milk and dried fruit.
Lunch: fresh fruit or salad.
Dinner: Chicken, meat or fish - quite a generous portion, with either salad or vegetables. Again, a big portion of veg. No carbs.
I drink loads of water during the day. I have had a (small)glass of wine with dinner on a couple of evenings this week.
I work 4 days, and on those days I am so busy, that I don't have a lunch break. I am home by 4 though, so I have my dinner early at about 6pm. I occasionally have a yogurt at about 8 pm."
You're actually eating a lot of carbs here!
First, porridge and dried fruit, then fresh fruit, wine with your dinner and then a yoghurt.
But you also say that with your dinner you have only veg, but no carbs! But veg do have carbs as well! And depending on the veg you're eating, there could be a lot of carbs here.