I think your LLMD sounds like a reasonable doctor. He's not piling a lot on or mixing it up. This can make you sicker sometimes! The cure being worse than the disease. So, you may not be in very bad shape at all, so try not to worry. It makes things worse. 200mgs may not sound like much, but may be all you can tolerate based on your size, but it will most likely cause a herx reaction -- photosensitivity, air hunger, are a few things frequently reported.
Stick w/ this doctor! Re. the neuro appointment, and the spreading of symptoms, one can never rule anything out...And it's smart not to.
Sorry about the odd sensations in your forehead. I can relate! Hope this doxy works on that too. GOOD LUCK!!! Be positive.