I am sure that many of us with MS have gone through the same kind of feelings that you are experiencing. It may take you a while to come to grips with your disease, but you have to be careful not to let MS and its symptoms overrun your life. What I mean by that is that you are still capable of having and attaining dreams, and you should not give up on that. You may have to adjust your dreams a little, but that is not always a bad thing.
I was in nursing school when I had my first major relapse, which was eventually diagnosed as MS. I no longer have the physical strength or stamina to be a nurse, so I have had to readjust my goals. I am now going to school to be a writer, which is good because I will be able to work from home, and even on days that I can't walk across the living room unassisted, I can still sit and type. My career change turned out to be a blessing in another way as well-because of my illness, my priorities have been refocused, and I am now pursuing a career that excites me, rather than one that will simply pay the bills.
So my advice to you is-
Take some time to grieve if you need to, then pick yourself up and make some plans. Don't sit around waiting for the next relapse to hit. Instead, figure out what's important to you, and then pursue it.
Be joyful in hope, patient in affliction, faithful in prayer (Romans 12:12).