Struggling with Disordered Eating and Isolation

I have something like disordered eatting in relation to my ADHD and Anxiety. Basically, I unintentionally taught myself to ignore my hunger, and, as a result, I only know I'm hungry when my stomach growls or has hunger pains. On top of that... I'm living in a foreign country, by myself, where I don't have access to the foods I know that I like. I don't have a freezer so I can't stock up on freezer foods. Going to the grocery store takes a great effort and my ADHD does not like it. The student cafeteria has been closed for the holidays. My ADHD also hates cooking. I'm a picky eater because of sensory issues. So, basically, eating feels like an awful chore for me most of the time. Usually, if the cafeteria is open, I'll make myself go once a day if I haven't had a real meal. When I was in classes it wasn't great but it was better because there was a grocery store right by my school and my friend and I would go together and we would always get lunch on campus (I eat about half my plate). But I've been out of classes for my month and my friend went home for the holidays. So I've been extremely isolated and I'm eating less than ever. I eat a sandwich and maybe a snack or two. Maybe some cereal if I have milk. My breakfast is usually a granola bar tho. Recently, I've been buying food I can heat in the microwave, I try to have one a day. But, I know I'm still not eating enough. I am exhausted all the time now. I usually get tired pretty regularly because of my meds, but this is different. I feel like I'm sick but I know I'm not. When I eat, I get more energy (I try to have one applesauce packet a day). But I just feel awful. Anyway, I went shopping today and because I was feeling so bad, the usual unhealthy stuff I normally like didn't seem good to me at all. So, I made an effort to buy foods that would be more substantial but still quick and easy. But I'm worried about eatting too much too soon since I've been eatting so little for so long. Also, despite knowing it will help me feel better, I still have no urgency to eat and have to consciously make myself do it (that and about a billion other things). I don't know if anyone else has had this specific experience, but I'd really appreciate some advice.