I am on day 4 and a re-starter, I did this 2 years ago and cannot remember feeling so weak like I am today, yesterday I was full of energy and did lots of chores I couldn't be bothered to do before I started the diet, but I can't do anything today, I even used the car to take the kids to sch (it's a 10 min walk) as I felt so weak to walk, my body is also aching esp my legs, cld I have overdone it yesterday with the chores or is this a normal thing. When I did it first time, I remember being on top of the world, full of energy from day 3 onwards... I'm also really sleepy? I never sleep during the day... shld I be worried?