Once you have psych. diagnosis its over, doctors see you throught that lens. Ah yes, he has anxiety, of course his symptoms are psychosomatic and there is no need for more testing. My uncle was schizophrenic, medicated and living OK life after years and years of delusions. He also had untreated diabetes for years, but was on the right track. He went to doctor with pain in belly, they sent him home and told him nothing is wrong, couple days after he died from ruptured gallbladder...
What I learned is also that often doctors will shrug at an unclear illness, and wait for it to become severe enough that it's obvious. Once I had 650 glucose and a A1C of 12, they couldn't say it was just a psych problem.