My Daughter Is 33yrs And Had A Gastroscope 2 Days

My daughter is 33yrs and had a gastroscope 2 days ago which found nothing she is constantly nauseaous and vomits everyday she is suicidal because she just can't stand feeling like this do you have any idea what could be wrong? She's taking 5mg of Prochlorperazine 3 times a day and 8mg of Ondansetron 3 times a day but they're not helping