You don't have to be a rake to have the attitude of an anorexic. I cannot understand how you are still alive or not permanently in bed. As people have said, your body uses about 1300 cals a day just for living and breathing. If you continue this then not only will your body be eating your fat storage but it will also start eating your organs. As soon as this starts to happen, you are on a one way road to an early grave. You need more sustenance! You are more than likely cutting out main food groups which can lead to other problems like heart disease and diabetes and you are putting serious strain on your heart as it is having to work so hard just to get the energy to beat.