Better to get it sorted sooner than later. That GP visit can also be a good time to ask about all sorts of other small issues, and a blood test is a good idea at least every year or two. Ask about hormone levels, iron, vitamins, everything; for you it's just a lab visit.
I can't wait until it's possible to get these tests a few times a year and have all the values charted somewhere tied into the personal health ecosystem. Ironically, as someone interested in online privacy, I find the medical data the least concerning; I'm willing to let all of that go if it means I can get back some good answers or better healthcare. I can understand why some people aren't, of course, and they should always have the right to it; and it's good that this medical industry privacy situation is influencing other industries as well. But still! Imagine if some ML system with access to the data of a million people like me could show me exactly what I should stop eating, or exactly what supplement I need more of....