I remember Day 3 being the toughest last time but not quite this bad! I got up this morning at 7am and couldn't actually get in the shower I was so weak. I went downstairs and had a shake and a pint of water but had to go back to bed as I felt like if I didn't lie down I'd fall down! I had another hour's sleep and fortunately felt able to face the shower then! It's 11 am and I've had 2 sachets and 2 pints of water so far and feel like a space cadet! - bit scarey to be honest!