Suggest Remedy For Persistent Vomiting Post Food Intake In A Teenager

My daughter 14 year having problem of vomiting after being taking meal or anything. This problem is continuous from last 25 days and she is hospitalised from more than 20 days. All investigation are done related to abdomen and brain such as ct abdominal, brain , MRI brain, endoscopy. Barium meal, USG, all serums electrolytes, calcium, vit. B12 , fertinine, cortisol, t3 t4 ,aga, ttg, HB hemophorosis, thyroid ect. Are normal. Nothing is diagnosed but problem is continuous. She is not able to leave without iv DNS , rl . regular treatment giving inj. Pantop, ondanestrom, levosulpride or stametil. No relief. Plz send your opinion what I doo and what s possibility to diagnos the disease.