Suggest Medication For Persistent Vomiting And Pain In Stomach

I have been throwing up.for 4 to 5 weeks everyday with lain in my sternum and now extending.my entire stomach. I ve been to my local er 3 times and I m taking Zofran Phenergan the cream....pill...and suppositories. What should I do. I feel like by entire body is shutting down?? Plz help