ALS? MS?

Hi - I started having symptoms in June of muscle twitching and spasms. I had an EMG a month into symptoms - normal. I also started having issues of bladder incontinence, chewing/swallowing difficulties, and muscle burning, tingling, and pain on top of the twitching and spasms. Also some mild weakness (without signs of atrophy) in my left arm and leg) ......Lately the past two months my voice sounds like I have a cold, but I don't .... I had a second EMG performed four months into symptoms (and two months after the first EMG) and it showed mild polyphasia in my left leg and arm with reinnervation.

My symptoms collectively sound very similar to ALS ..... some also sound similar to MS ..... How accurate is EMG at picking up ALS in early stages? What can cause mild polyphasia and reinnervation?

I have not had an MRI yet to rule out MS ..... I have had a spinal tap and that was normal.

Please offer and advise, thoughts, opinions ..... very concerned.

[cardiactec]

BTW, Female, 28 yrs old.