Tracy,
Wow! Things are moving along well now. Those initial tests can tell a lot.
You need to be patient; those tests are great initial tests to determine if you have MS.
We will be hoping for the best for you. Prednisone can have some side effects, although if it's only for 5 days, maybe not. I'm not familiar with a 5 day treatment, but if you are experiencing ON, I don't know about that particular symptom. I only know about longer-term Prednisone temporary side effects.
Good luck Tracy.