We did every test from May to December - barium swallow, upper GI, endoscopy....nothing picked up on it. He couldn't figure out what was wrong. He thought it was a slight hernia so he scheduled a surgery to correct it. He found the slippage when he opened me up and said that he couldn't diagnose it when the band was deflated. Scary. I too was on steroids for esophagitis and reflux medicine, but the pb'ing and throwing up continued. It was the craziest thing. I hope you figure out what is wrong soon and you get back to feeling better!