hi diane. welcome.
i agree with the others.

what you and your son might do is work out a timeline of his sx's. dates with when the sx (symptom) started. it might help the dr with his H&P (history and physical).

he should get a head to toe exam. i think it's a good idea to go with him for a 2nd set of ears.

MS can be a mimicker of other illnesses so it's up to the drs to tease that apart. most drs start with labwork. i hope his did.

the bloody stool may be something completely different so that should be a separate followup. you might want him to see a GI dr if the blood con'ts. he could also just have a bleeding hemorrhoid. his dr should be able to dx that.

glad you found us. please keep us updated and best to your son.