I had a similar problem with my eye - complained for 3 years about fuzzy vision only to be finally diagnosed with RVO and told off by the consultant for not reporting it earlier!
But we're discussing CD.
As you've already started cutting out gluten then adding it again I think you have proved to yourself that gluten seems to be the problem, your next step is obviously to get your GP to recognise this and get the ball rolling for you. Do you HAVE to see this same doc all the time? Are there other docs in the practice who may be more understanding? You don't seem to have got the sympathetic care you deserve, its horrible not being able to stray far from a toilet for fear of getting the 'runs' or being sick.
You can google your doc and see what he specialises in - your's may be a good joint man and not interested in digestion.
Off topic: I'd be interested in discussing ankle replacements with you some time. Can we PM each other on this site?