Troubling diagnosis concerns patient

I remember at 15 I visited my doctor, complaining of continual tiredness and unable to do anything.

He proceeded to ask me how I was feeling mentally. I pointed out that I was fine mentally and that I wanted a diagnosis for what was affecting me. He finally agreed to take bloods, about a half pint in total. They all came back negative. A few days later I visited him again, stating that he had, within the last month, diagnosed my brother with glandular fever, can I get checked for this also.

A few years later, I visited another GP complaining of a stinging sensation down the back of my leg. He quite frankly told me to join a gym. I have always been very active. And then recently, I visited a GP requesting confirmation as to whether I am coeliac. He informed me that this is only diagnosed in infancy. Completely untrue.