Hi Diane, Nice to meet you.

I am so sorry about your DS's illness. His symptoms do seem to warrant further MS investigation. I hope the Neuro you chose to see, is thorough and has some answers for you.
The road to a DX is sometimes a process of elimination. There are all kinds of neurological illnesses, such as MS to test for so hang on and check in here, through the process, and let us know if we can be of help to you.
Well Wishes for You and DS..