Happened to me last year.
The way it seems to work is that if you have deteriorated (my case from EDSS1.5 to EDSS 6.5) and then been more or less stable, you are considered to be SPMS and therefore do not qualify for Copaxone (or any other 1st line DMD, I think).
For me, this was accelerated by the Healthcare at Home screwups last spring, and I stopped in mid-May.
My relapses have always been in the form of extreme fatigue. I had one bout of fatigue about a month after I stopped (mid June), and another (not very bad) after Christmas. Neuro said that fatigue on its own, with no other obvious neurological symptoms, was probably not a relapse. I started to keep a log of what happened when I stopped - but I was writing the same thing every week (like:no change) so now I only update it as-and-when. I do suggest that you do the same, so that you have a record of any changes that do occur.
If you want more, PM me.