HELP why do I get anxiety to eat?

All night I don’t sleep due to my job , but I now am getting anxious at night want eat 1am to 3am I’m so anxious I can’t take it and been eating cake lol. In the day after work I’m anxious to eat lunch, at night thinking what I’ll eat next day, I’m underweight , had gained weight then lost weight again, all day craving foods that I wana eat for next day, I don’t eat dinner only meal supplant shakes due to past choking issues. I have anxiety to eat but losing weight as I’m working 3 jobs at moment

HELP why do I get anxiety to eat?
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