Unfortunately a lot of the meds are hit and miss but there's so many choices don't give up on finding the right one for you!
Ritalin is what my husband takes currently for fatigue. It works quite well for him, although some people say it makes them jittery. He takes one at 6am and another at 2pm, any later and he has trouble sleeping.
Have you tried Baclophen yet for the spasms? It seems to work quite well especially for leg spasticity. Some other alternatives are zanaflex and flexiril.
Good luck with the steroids, try not to worry too much about them. They might help this flare end quicker so you feel better faster and take care of that young baby. Let us know how you do!
Kimber