Most of what I read and what I have learned from my grandfather is that is usually does start in the head and neck. He did not progress to general weakness, however, he was in his late 70's when he showed signs.
Perhaps I am dealing with another type of disease all together. I am completely fine today (it's only 11:00), However, its all just so odd.....

I also keep thinking (because of the dizziness) if inner ear infection can cause severe weakness in my legs.

I think that if it is Myasthenia, it will show itself in due time... i just have to be patient.

-S