kikicee, your doctor is a moron. I don't think there's any other accurate word to describe him. ...oh, and the obesity specialist is just naive.
The last time I talked to a doctor she wanted to put me on a fat blocker. I even told her I was eating 1000-calorie low fat diet. I guess she thought that was too much. The time before that I was told that people tend to eat about twenty percent more than they think they so and so I counted EVERY single calorie. I know the caloric content of stuff that no one should know, like the two calories in Diet Coke and the three in a packet of Splenda. I weighed my food by the gram, which in the states is unheard of. We usually weigh in ounces but since grams are more accurate I did that. Lots of doctors are seriously morons. It's like if you don't have a diagnosis they've seen a million times you're obviously a faker or some other nonsense.
I really hope you can see a different doctor who is reasonable and will find a diagnosis that fits your symptoms and then help you work towards a cure.