There are no conclusive answers, except it's MS. I'm so sorry, this must be a scary time for you. Sometimes the steroids take awhile to relieve the inflammation, and sometimes after the lesion area calms down, you regain function, especially if you are relapsing/remitting. My husband recently had a slight flare, lost sensation in his foot, but now it's back again. It's so hard to say if the copaxone is "working" or not. It's sounds as if it is, because you've been relapse free for awhile. Copaxone was created to slow the time between relapses. MS is progressive...the speed of progression is unknown. Talk with your neuro if you want to try another pharma route.
Some of us have tried to put the brakes on MS with nutrition, exercise and supplements. The program my husband is on is in blue below.
My thoughts are with you today...
Husband dx RRMS 3/07
dx dual jugular vein stenosis (CCSVI) 4/09