Tambo,
I work for the communicable disease division of Toronto Public Health and deal with a few cases of Lyme disease every year.
First I have a few questions:
1) Have you been genetically tested for ALS? That will rule in/out that potential diagnosis quickly.
2) What exactly have you been experiencing?
3) Do you recall a "bulls-eye" rash in your past. Important to know however that not all people have this rash.
TESTING
Your doctor might run two tests for lyme disease. One is called and ELISA the other is called a Western Blot. The Western Blot is a more senstive version of the ELISA. These tests look for antibodies to the bacteria that case the infection. There are 2 classes of antibodies they look for: 1gG and IgM. If you have IgG antibodies and no IgM, then it suggests you have been infected, but in the past. If you have IgM and no IgG, is suggests a more current infection. Past infeciotn would/can cause very bizarre neurological symptoms.
If it is Lyme disease, then it is treatable with long courses of antibiotics, but the earlier the better.
The other thing you might consider, although it is a long shot, is West Nile virus -- it can cause all sorts of weird neurological manifestations. Again - easily tested via a blood test where they look for IgG and IgM antibodies to WNV.
Hope that is some help and good luck.
Mark