12Tribe,
There is no way to make sure it isn't either, unfortunately, . . . the EMG test results are good news though.

Although its often called a diagnosis, it really isn't . . . its an end of what medical science can currently tell . . . the prognosis is instead fit to the symptoms.

Yours sounds like a Larynx problem, I would suggest an ENT type doctor. An ALS 'diagnosis' at this point may be less likely - the content of your remarks, however, does not rule out the possibility.