Rye, find another doctor right away. There are no signs of inflammation (okay microscopic, but thats very technical) such as in Inflammatory Bowel disease.How did he know you had inflammation if he didn't do tests. If you do have inflammation, all the more reasons for tests.You need to find a good gi doctor who will listen to you and explain stuff to you and do the right testing.Did he give you antibiotics for a urinary infection though? In that case you should be taking the antibiotics if you have a valid diagnosed infection of some sort.If he is giving you antibiotics for IBS, I would strongly question this.I think you should find a new doctor and its hardfor anyone to say much here without more information your symptoms and history.