Hi Blondie!

Sounds like it has been a busy day.
It sounds like the doctor took you seriously and is checking you out for rheumatoid arthritis and a few other things that could be causing your symptoms. Hopefully they will reveal something, but there's always the chance that he might be overlooking other things and didn't check for everything.
So, if these tests come back negative, don't get discouraged, and know that there are still other things to look for. Hopefully these tests will reveal something, though. Not that I want you to have arthritis, but obviously, we all want you to get ANSWERS so that you can get treatment and feel better.
If you ever need more ideas on different things to check for (besides Lyme, HE, celiac, etc...), then you might try the wrong diagnosis site, as they have a multiple symptom checker that can spit out lists of different things it could be after you type in various combinations of symptoms. It's not 100%, but it might give you more ideas to work with that we're not thinking of and that your doctor hasn't thought of.

I pray that your present batch of tests will give you answers, though.
Know that you are not alone in being undiagnosed. So many of us have been there and know how painful it can be. You are doing everything you can by seeking answers with your doctors.

Keep us posted!
Best Wishes