I went through a similar experience. I had my surgery January 7th and I’m just now starting to recognize hunger. The first month or so I had to make myself take 1-2 sips or bites of something every couple of hours. Headaches and shaky hands were the main signal letting me know my body needed nourishment. Now I’m averaging 6-10 bites and I’m full for hours. Focusing on protein has helped immensely.