A headache on day two is quite normal.
Its just the rush of toxins moving around in the body at the outset of the cleanse.
Your doing everything perfect.
SWF, lots of water and lemonaide.
The SWF (Salt-Water-Flush) is important for getting the system cleaned out in the quickest fashion.
The headache phase will pass.
Wanting to eat, is something I experience during the first days of a cleanse.
Later in the cleanse, - not at all.
The desire is probably just more of habit.