Jan 1st - 16st 0lb
Jan 10th - 16st 2lb
Jan 17th - 16st 3lb
Have you actually been dieting or just weighing yourself whilst not really changing anything?
Genuine question by the way, not mocking.....
If you've been putting some effort in but seeing your weight increase it could be very discouraging. If you're in a calorie deficit you WILL lose weight but if the scales don't show it in the first few weeks you could easily quit thinking it isn't working.
The way around this is to weigh yourself daily, not weekly. Weigh in every morning at the same time then take the median from the last 7 days as your actual weight.
You could change from a 4000 calorie 100% fat based diet to a 2000 calorie protein/carb diet and actually gain weight in the short term just through water and the actual mass of the food. Every 1g of carbs you consume absorbs 3g of water like a sponge so you gain weight even though you're in a calorie deficit. You'll be losing fat from your body but gaining a bit of water. After a short while the fat overtakes the water and you'd see a consistent loss.
Not saying this is what's happening, it's just an example of how the scales can mislead.
What a fantastic excuse Matt has given all failed dieters already struggling