Possible ALS?

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It begun in January with a feeling of being light-headed and off-balance. When I turned my head, the room would shift, sometimes violently. Also, when I walked, one foot would feel like it was sinking and it sent my whole body off balance. I also had all-day headaches at that time which were not affected by asperin etc. Since then I have multiple other symptoms, such as shivering up and down my spine and torso, twitching, tremors and continued balance problems when walking but no longer when turning my head. The headaches have also passed. In the last few weeks, I have had muscle weakness, or feels more like stiffness, in my right leg making it difficult and tiring to walk. Over the last 7 months, I have had 2 brain MRI's, a BAER test, an EMG of leg and arm, EKG, and numerous blood tests, all clean. My present neuro says he is now concerned about ALS. He is someone I have just started seeing. Reading through the forums and info, the progression of my symptoms does not seem to fit,, though the weakness does have me worried as I have never experienced this before. Is tALS something I should be worried about? If yes, what further tests do I need? I have been passed from one doctor to another throughout this illness and cannot seem to find one I trust. They frequently contradict each other. My current neuro is the only doctor I've seen who wanted me to have a 2nd MRI, for exp, which I had last week. All the others said not necessary and ascribed my condition to 'anxiety.' It is difficult to know what to do, especially with all the bills piling up. Does anyone have any advice? I am 35, male, no previous medical conditions.