Eating disorder - AFRID TW

I don’t know what to do for this. I’ve lost almost 20 pounds within the last month and half and I just cannot eat. I’m not interested in eating, I’m not hungry, when I do try to eat my mouth goes bone dry. It’s disgusting. Certain textures make me nauseous, thinking about eating makes me want to throw up. If I get stomach pains I just curl up into a ball and wait it out. I get nauseous to the point of almost blacking out. I can’t eat in the mornings usually. I do smoke to eat but with my new job that’s not possible for every meal. I’m getting less than 1000 calories a day and I’m pretty active so it’s really not healthy. Logically I know all this is bad but like even typing all this, thinking about eating my stomach is like no. Nothing sounds good to me. I want to gain weight, I want to be healthy, but I can’t. I do have a new psychiatrist and will be talking about this next session as well but until then, what the f do I do?