Yeah those first few weeks are a bit tricky. I know I felt hungry all the time, had headaches, insomnia all sorts of vague symptoms. Make sure you eat good large meals, snack if you need to and make sure you get plenty of good fat. Try reducing the fruit and replacing this with say a boiled egg, or a handful of nuts. But do this slowly, don't get all overzealous and push yourself too hard to start with. Some of the men on this forum will give you a hard time about being 100% with the 'programme', but don't let that worry you to start with (they're right pillocks!). Your body will adjust to your new way of eating it just takes a while to iron out the kinks.