I think that it would be a good idea to talk to your doctor about getting a CT scan.
Have you ever had a CT scan?
I have had a Barium swallow. Upper and lower GI about 10 years ago. The doctor just kept recomending different types of fiber and laxatives. To be honest I haven't gone back in 5 years for this because I am frustrated with the results every time. I need to say I also have hypothyroidism and fibromyalgia. Inspite of all the vomiting I struggle with weighty. I have been excersizing regularly for the last year. The spot that I have the pain is exactly the same spot everytime. It does not radiate. I can actually put my fist on the exact same spot everytime. Lower left quad.
Welcome to the gastroenterology community! What tests have you had?