Struggling with Loss of Appetite Due to Pain Medicine

i’ve been having so much trouble eating recently because of loss of appetite, i think because of a new pain medicine i tried even though it’s below the lowest dose. i’ve stopped taking it because i ran out but not having an appetite is dangerous for me with my eating disorder. i don’t know if i’m looking for advice or what, but it’s been really hard for me to function normally :( i’m hungry but the thought of putting food near my mouth sometimes makes me feel sick :/