Why do doctors take so long to figure out the cause of my intimate pain, and sometimes even say I'm imagining it?

This is indeed a common situation. Vulvovaginal pain is not a single disease but a group of conditions, and often a single symptom can have various underlying causes: inflammation, neuralgia, or muscle tension. Moreover, there may be no visible changes—tests are normal, but pain persists, so a doctor unfamiliar with such cases might mistakenly say it's all in your head. But it's not: it's important to find a specialist in pelvic pain and not give up, asking about treatment options, physical therapy, and the connection with psychology. Remember that the absence of findings on an ultrasound does not mean your pain isn't real, and you have the right to be taken seriously.