When your so frusterated how can you not end up crying ? I don't know about you but I tend to wear my emotions on my sleeve and even more so now that I cant seem to control what is happing to me. I keep thinking maybe I'm creating all this crap in my head but then my body tells me different when I want to do something and the fatigue just knocks you to the floor.
I suspect there is another issue here too -- the steroids can really "play" with your emotions, one of those negative side effects that aren't always mentioned. They can cause you to feel very weepy and emotional, and when you're already upset (understandably!), they can cause you to lose emotional stability.
And of course MS itself can cause emotional lability -- loss of emotional stability. So in combination, you can feel really "out of control of your emotions" until you stop the steroids.
I'm really sorry..but no, you can't control what is happening to you. If indeed you have MS, then the myelin is being destroyed, and it's destruction is what is leading to your disability -- the numbness, tingling, etc. The steroids (and other meds) will treat that..but not make it go away entirely, nor (of course) cure the MS.
Yes, the fatigue can knock you (and me) to the floor. Over time you'll learn how to balance that with what you need to do, and want to do, and it'll be easier. But it's very hard in the early stages to achieve that balance, I know.
...I am not a doctor, nor health professional, and don't pretend to be one, here.....