Hi Sally, it will get better, I promise! I found peppermint tea realy helped me through the first few days, seems to settle your stomach a bit. I also had my water as cold as I could stand it, and fizzy water helps to fill you up too. I made some ice lollies from tea and plain water, felt a lot more like a treat than just a glass of tap water!
Stick with it honey, remember why you are doing this, and it will soon pass. Good luck!