Hiya Jen.
Yes I get that too. In my case it is not so bad because since I have been 19 I have had hormonal problems which make it easy for me to gain weight and incredibly hard to lose weight and as such periods where I cannot eat much do not scare me as much since I know it would take a while before I get too skinny for my own good. As you can guess, well I am not fat, but I am chubby lol. With me anxiety can make my relationship with food go either way. It is a love-hate relationship between my food and anxiety. Moderate to high anxiety makes me totally not hungry at all. I can barely eat. Whereas moderate to low anxiety makes me eat a lot. I am an emotional eater/non-eater. So depending on my anxiety levels I either have to watch myself to not eat too much for no reason (i.e. only eat when I am truly hungry not when I am trying to pass my nerves) or make myself eat more.
Now between December and February I had a two month period where I could barely eat. I have to tell you that for me the only thing that helped was mind over matter. I made myself eat whether I wanted to or not. I prepared 6 smallish snacks which amounted to a balanced amount of food and a balanced diet for a day. And I made myself eat all six at regular intervals during the day. I would prepare my snacks the day before and make sure to eat them so I would at least get the minimum amount of food required in me. Now sometimes nausea took me and I threw some up but I figure anything that stuck was something I won lol. Plus, this way of doing things helped me not get the symptoms of malnutrition etc which dont help anxiety one bit.
I know my advice sounds awful. But if your body is not hungry it will send less funky sensations to you. When your body is underfed it can make you feel nauseous and dizzy and weak and all sort of stuff us anxious people freak out at which in turn makes you anxious which in turn makes it harder for you to eat. Vicious cycle. Anyway, sorry that this is all I have to offer you but for me it worked. I still lost weight between December and February (Not that I mind in my case...)but not as much as I would of if I had only eaten when I wanted to cause I didnt want to eat at all. Also, you could go see your doctor. In your case, if your weight is too low, he could m