That's the ketosis. It will eventually clear up but initially you can feel that for first 10 days or so, I know I did. 3litresvif fine though I know my drink more but really it isn't necessary and it can be dangerous. I'd stick to what CWP recommend. Another day drawing to a close for you! 4 months is plenty of time to shed a good amount of weight. If your sticking to plan over Christmas even better you get 12 full weeks of cd before a break. Look at tht 12 weeks in chunks of 4 weeks x 3. It makes it easier to keep going.