I might say that my current pdoc diagnosed me too quickly. I believe she dx'ed me as having bipolar disorder at the start of our second appointment. Awfully fast. The only reason I wasn't too surprised is because I'd been dx'ed with BD for so many years prior.
Many, many years ago a male psychologist diagnosed me as having BPD. I was very upset, especially because the symptoms didn't fit for me. The so-called "BPD" turned out to be CPTSD and of course, bipolar disorder.