Hard to tell what to do sometimes, isn't it?
I have no experience at all but I have heard that flagyl can be hard on the disease - so good luck with your decision. When I have doubts, I usually trust my LLMD.
I have tried abx that have helped others but turned out to do nothing for me at all. I have tried other abx that others don't tolerate - and its working great.
Its a tough disease to treat and recover from.
A person can test negative and still have Lyme. Was your Western Blot done at Igenex?
Did your headaches and eye pain and lightheadedness get worse after you began taking abx?
It might not hurt to take the MS tests, just to put your mind at ease and maybe even rule out - or get definite diagnosis of - MS.
Sorry I have no answers. Hang in there.
Peace and health to you,