I hate my mental health impacts my relationship with food

I suffer from ADHD, GAD, undiagnosed depression and possibly autism. Many times I struggle with motivation feeling too lazy to eat and when I finally choose to eat it’s usually comfort food and I hate how I struggle to have better eating habits. I’m 5’1 and around 103 pounds however I saw my waist and it didn’t look as smooth and slim as it used to and I have this irrational worry of me being fat even though I logically know I’m not fat. I hate this so much the last time I tried to diet I was hungry all the time and that didn’t feel nice. I feel stuck…