Glad you're changing doctors Brunneria. Vitamin D3 levels are important, and problematic if too low or high. Without the test, we have no way of knowing if we're within range. A lot of us have to pay out of pocket for that test in the US too. Some doctors adhere to what they were taught in medical school, and aren't open to changing their way of thinking.
In the US, the problem is the pharmaceutical driven education they receive, not to mention risk of losing their medical license and threat of law suit if they stray too far from conventional treatments.
Happily, in the US, with the introduction of naturopathic and functional medicine 25+ years ago, more doctors are seeking training that empowers them to actually help their patients through use of appropriate lab tests, diet, nutritional supplements, exercise, and, if needed, medication. We have a long way to go.
For now, I have my lectures, interviews, books, articles, and members of this forum to guide me. Wish I knew then what I know now so I could have stopped the progression of my diabetes before I became severely insulin resistant. That said, I'm enjoying good health now, in great part thanks to you all.
Hope the next doc is a good one!