Like Yazzer said, anyone with Lyme Disease (especially if they have the co-infections as well) that looks long enough and hard enough will find that they have what ever their "worst nightmare" is. That's the thing with Lyme, there's a reason that it's called the "New Great Imitator" since syphilis was known as the "Great Imitator". Lyme alone mimics over 300 other conditions/diseases!! Here is a link to what one person has compiled as the 300 other conditions:
lymebook.com/blog/testing-diagnosis/misdiagnosed-diagnosis-mimics-great-imitator/ This person of course adds in what they believe will rid us of Lyme, but please remember, there are NO quick fixes with these very complex infections!
Another thing is - no, in three weeks you may not have even reached a point where enough of the active spirochetes have been exposed to the abx in your blood to have made even a dent in your infection. Time for science! LOL! The bacteria can move between three different forms;
*Spirochete form - this is the active form that can be found in the blood and killed with abx.
*Cyst form - these little buggars can actually "cloak" themselves, making them invisible to the immune system, allowing them to avoid any attacks.
*Cell Wall Deficient form - I believe this is the form that lives in biofilms, a nasty mix of things that actually create a safe 'community' where bacteria and other non-goodies can thrive and stay safe from all attacks as well.
So in order to make a real difference in your bacteria loads, you have to be on a strong enough dose of abx for a long enough time to catch the bacteria in the blood stream. Unfortunately these bacteria don't show up in the blood as often as other bacteria. Most bacteria repeat their life cycle in 24 hours or less - B.burgdorferi (the infecting bacteria of Lyme Disease) life cycle is actually more like 2 - 3
weeks.
As for your anxiety over the Neuro's appt, why not call and find out if they are Lyme literate? If s/he is, then they will be aware of the possibility that you may have Lyme and won't just automatically brush the possibility aside. If they aren't Lyme literate, then they won't even consider the possibility that you could have (and from your symptoms it sounds like you do have) Lyme Disease, so they will, of course go looking for another cause for your symptoms - although that doesn't seem like a good thing when a doctor refuses to even consider that you have something even though your symptoms all point to that.