If you gut tells you he is wrong get a second opinion...
Years ago I got very sick from an intestinal "bug" for two weeks I got to the point I was literally crawling to the bathroom every 10 minutes I was so weak...
After multiple tests and nothing showed up as the cause...doctor admitted he didn't know what was wrong with me...but was glad I got better...LOL
If you took your car to a mechanic, (I mean a really good one, that has been to car college and everything,) but after 2 weeks your car is still broken and he admits to you that he has no idea what is wrong with it and cant fix it for you......would you pay him?
....do you know what the call the guy who graduated last in his class at doctor school?
....now my blood pressure is up........