Hi Joanie,
We have several members with MS, I hope they can reach out to you with specifics of their experiences.
High dose steroids are immunosuppressive so some relief from the effects of MS may occur. Of course I certainly hope so for you.
Just be very aware of any changes in your condition and any flares and report them to your medical team ASAP.
BTW the neurology group I work with (loosely) has had some success with treating MS with Rituximab, and I am aware of several new immunotherapies coming onto clinical trials.
If and when you need them I hope they are available to you and please ask your medical team for access to medical trials if your condition worsens.
It is a horrible condition and I wish you every success in dealing with it.
My Love
Cindy