I don't eat much and don't get hunger cues

I have been steadily gaining weight the past several years and I'm not sure what to do about it. I already don't eat much. Maybe a meal or two a day because I don't get hunger cues and I honestly forget because of the ADHD. I don't eat big portions of food. I eat vegetables. I eat fast food maybe once a week. I mostly eat Latin American home cooked meals. I exercise intermittently and at one point last year I exercised (cardio and weight training) for about 6 months and lost maybe 5-10 lbs. I'm not sure what else to do. It's frustrating and I don't know what to do about it anymore. It's seriously affecting my mental health cause I don't feel good about myself at all. I've always had a bad body image of myself and this has made it so much worse. Any advice would be helpful