I can totally relate. Doctors are frustrating. Diagnosis seems so difficult.
I perceive that I have kidney problems. I can't tolerate protein, constantly tired, irregular heart bets My urine smells like sulfur and is cloudy. They have tested for blatter infections, kidney infections, and kidney stones so many time it is ridiculous. My kidney test are in the normal value but I have hormone dysregulations (fancy word for misc hormone irregulaties) and currently my liver enzymes are starting to raise. But no answers. Wish you well.
I read a lot about kidney problems because they have been working for 2 years to figure out what is wrong with me. Oh, I am cynical because I don't think they work that hard. They run tests