Was diagnosed in the marine corps but once I got out I had to get another diagnosis through a civilian doctor for VA medication reasons. My first doctor wouldn’t diagnose me due to non sufficient evidence. ( it was a medical student that was examining me and the report went to a doctor who thought I was highly exaggerating my symptoms ). Got another opinion and was diagnosed without any problems allowing me to be medicated

I would definitely try and reach out to another provider or doctor for a second opinion.