I am just going to throw this suggestion out because you say your LLMD is away.
Have you ever directly reached out to any of the leaders in Lyme research? I don't mean just in your geographic proximity. I mean anywhere in the States or in other countries. You won't get anyone who is willing to diagnose you over the phone or via email, nor should you, but there are compassionate nice experts out there on both sides of the Lyme wars, ILADS and IDSA. Some might give you recommendations on avenues to pursue. The fact of the matter is these experts are passionate about their craft, and some of them give a damn; if you can find the right ones, they may open up and talk theory and possibilities with you.
It shouldn't matter that you are located in the midwest. I am in the NE and I've "spoken" with experts from NY to California to Switzerland.
I have emailed several, and many have responded, and we've carried on dialogues that way. I frequently give my phone number, so some have actually called me. Some of those have given me good advice - some of which I chose to walk away from. But some I followed.
You might be surprised.
If they are researchers, then they will have done studies and you can get their contact data that way. If they are clinicians, then you know how to google that kind of contact data.
It opens up the Lyme world a little bit wider. Start with individuals who have a history specific to your concerns, i.e. any authors of papers on Borrelia and thyroid issues. (For me, it was late stage neuro lyme, so I considered people with reputations or who had published in that area) Like I said, I was so surprised at how kind and giving of their time - without any hint or mention of remuneration - many of these people were/are. Worse case, they will ignore you.