Hi KBT - I'm sorry you are having these troubles, but welcome to the forum. As Zaphoon said, it sounds like your doctor is justified in seeing a potential for
ALS, but the experts at the
ALS center will be much more qualified to give you a reliable answer. I know it can take a long time to get in to those places, I hope they can do it in more like weeks rather than many months. I think it was about 6 weeks before they saw me first, but that was mostly just taking my history and a physical exam; it was another 6 weeks before they were able to schedule an EMG which led to my diagnosis.
Even though your doctors tests have largely ruled out other conditions, sometimes there are additional possibilities. MG for example is usually eliminated with a blood test, but that is not completely reliable. There are other tests they can do to help distinguish MG from
ALS, and perhaps the doctors at the clinic may wish to pursue that, or other directions.
One good aspect is it sounds like your progression has been relatively slow and steady, so even if you get bad news, you may well have a much better prognosis than many PALS (People with
ALS). And as you learn more about the disease you will find that with good medical support, if you take advantage of all that modern medicine can provide, survival prospects are much better than you commonly hear. But there will be plenty of time for that after you get more information from the clinic. For now I think your policy of denial is not a bad idea at all.