Suggest Remedies For Nausea,chronic Headaches And Vomiting

21 yr old female with Down syndrome 55" h 105.6 wt. . Sudden onset nausea, projectile vomiting for several hours--non digested food from 3 days earlier. Dizzy. Head ache for 3 days. "My brain hurts." Acemetaphine give no relief. Has mild chronic kidney disease. 1.3 No fever no diarreah. CAT revealed stones in appendix. ER referred to hospital.