Weight loss

I can't lose weight. Iv fluctuated between 100-107kg for 10 years now. I did lose a fair bit of weight back in 2018 dropping to 87. New psych meds that caused constant adrenalin, and I couldn't sit still. No sleep, restless body was torture. With a med change, im totally stable. But my weight won't budge. Im not hungry. My appetite is so low, that I only eat when I feel my body screaming due to not eating. Due to this I have very little energy. But I can't eat when not hungry as it makes me feel eh, and bloated. I try and keep my intake low gi. I will admit I do have a sweet tooth but I keep it limited. I had to do a food diary for a month. I was eating on average 1200cal a day, mostly eaten at dinner. I have forced myself to eat 2500cals, its not easy. I am walking even though I feel drained. All my bloods have come back clear.. I feel stuck. I feel fat, and so alone because ppl just assume that because im fat, I live off junk.
I can't change meds. Iv never been this stable in my adult life. And choosing between sanity, and a waist line, my sanity wins out. Its take 23 yrs to find the right combination.