You must stop this way of dieting straight away, I used to suffer from anorexia, and it ruined my life. You might feel okay at the moment, and proud of the fact that you have lost 6 pounds. But stop it at that, and start dieting in a normal frame of mind.
May I also mention that you cannot really 'bring-on' or decide that you are going to have an eating disorder, it is a horrible way to live your life, it is a mental health problem, and 1 in 4 people with eating disorders die from the disease.
When I was ill, I became so tired from eating so little, that I could work, or even walk upstairs. Luckily I got help from a counsellor and GP before I was hospitalised.
You need 1200kcal alone just for your body to think and breathe (not including any movement). And as soon as you begin eating again, you will regain all the weight you lost within a year. Therefore, eat healthily, exercise and lose weight slowly. Otherwise this maybe the last decision you make. Being thin is not worth taking your life for.
Go and see your GP if you still feel the need to eat nothing.