Hello. I Have Been Experiencing The Same Symptoms For About

Hello. I have been experiencing the same symptoms for about a week now...left lower back pain that radiates around the left side to my stomach, symptoms include vomiting, diareah, pain. I am unable to keep food or water down. I was told that bacteria through a blood sample; however, the medicines prescribed are brining no relief. New symptoms include bright yellow stool and yellow vomit.