Never tell them you're doing underground shit, no matter how cool you are with your doctor... First and second rule of fight club. It should be general knowledge by now. These doctors, in a good way and a bad way, are brainwashed against certain things. Her response is not surprising, your reaction to it is though.
Anyway, you didn't specify clearly what you're looking for. You want to do your own labs? I would confirm if it's cheaper, but there's many websites that offer them through Quest diagnostics or Labcorps. I use fitomics, but might cancel after I get my labs done. I'm doing a lot back to back and they're the cheapest with volume. Otherwise, there's privatemdlabs, which I'll consider later and some like marek health.
There's quite a few more, a simple search will help. Bottom line, don't share your shit with docs.