Ok first of all your stomach needs regularity. If you starve yourself, knowingly or unknowingly, your stomach will prepare itself for when you do get food and convert everything to fat, rather than processing the nutriants and vitamins. So during weeks 1 and 2 you are not doing yourself any favours. Especially if you are working out aswell.
During a normal day you should drink water. Not water and stuff, just water. This is to hydrate you, and will aid with concentration, good skin and making you feel less hungry amongst other things. Tea and coffee are diarretics and will dehydrate you more. Fruit juice contains ALOT of sugars, and although its ok to drink a glass for brekky or something like that, its prob not doing you any favours if you drink it throughout the day.
Week 3 seems pretty normal. Although I would suggest maybe upping the portion sizes a little. Unless you are a midget or a child of course. No offence meant if you are a midget
Week 4 is a bad week! I'll say no more.
So anyways, I would suggest 3 healthy sized meals per day. Doesnt matter too much what it is, as long as its balanced and contains some fruit and veg. Drink plenty of water and you'll be doing better. Get some regularity in your eating habits, body clocks function a million times better when they know whats coming, and it sounds like yours doesnt know whether its coming or going.
My current fridge and cupboard contents are veg, fruit, fish fish fish, wholemeal breads (white bread tastes like bleach to me) wholegrain pasta, porridge oats, organic chicken, org free range eggs, semi skimmed milk, salad stuffs, fish, flapjacks my girlfriend made, fish and some more veg.
I do have things like snickers bars, coffee etc. But eaten/drunk in moderation is fine. I have one coffee first thing for example.