
Ash, take painkillers if you haven't already, your headache isn't mean't to be a penance, it's just something you have to get through the best way you can and if that means taking medication, or have someone give you a head, shoulder and neck massage, or even a lie down in a dark cool room do it, don't suffer needlessly.
The changing from red and green days is up to each individual, you can eat just red days or just green days until you lose the weight, or you can alternate, some change weekly others daily. Some, and this is the group I find myself in ,decide when they wake up whether it's going to be a green or a red day.
Then just to really complicate things, when you get near to goal, or are feeling confident in being able to food optimise, you can 'mix and match' and that's eating green and red meals on the same day. So you could have a red day breakfast with a green day lunch followed by a red day dinner.
Nicki