I too think that if you haven't been evaluated by a Dr recently, that a check up might be in order. The thing with anorexia is that it messes with your entire system, from brain to butt. I'm not being funny. Your body is lacking nutrients, vitamins, antioxidants, sodium levels are probably screwed up along with sugar levels.
You need a diet that hits all food groups to assist in putting these things back into your body, but in a way that won't upset the delicate balance that your body is in right now. I know this is frustrating, being that you want to get better, but I'm sure that you are also worried about regaining weight too. Your body needs fuel to survive, without it, it starts to shut down.